| /* Copyright (C) 2015 by Yves Godin <support@nuranwireless.com> |
| * based on: |
| * femto_l1_if.c |
| * |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 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 Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| #include <string.h> |
| #include <errno.h> |
| |
| #include <nrw/litecell15/litecell15.h> |
| #include <nrw/litecell15/gsml1prim.h> |
| #include <nrw/litecell15/gsml1const.h> |
| #include <nrw/litecell15/gsml1types.h> |
| |
| #include <osmocom/core/gsmtap.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/core/timer.h> |
| #include <osmocom/gsm/protocol/gsm_04_08.h> |
| |
| #include <lc15_l1_if.h> |
| #include <gprs_debug.h> |
| #include <pcu_l1_if.h> |
| #include <pdch.h> |
| #include <bts.h> |
| |
| extern void *tall_pcu_ctx; |
| |
| uint32_t l1if_ts_to_hLayer2(uint8_t trx, uint8_t ts) |
| { |
| return (ts << 16) | (trx << 24); |
| } |
| |
| /* allocate a msgb containing a GsmL1_Prim_t */ |
| struct msgb *l1p_msgb_alloc(void) |
| { |
| struct msgb *msg = msgb_alloc(sizeof(GsmL1_Prim_t), "l1_prim"); |
| |
| if (msg) |
| msg->l1h = msgb_put(msg, sizeof(GsmL1_Prim_t)); |
| |
| return msg; |
| } |
| |
| static int l1if_req_pdch(struct lc15l1_hdl *fl1h, struct msgb *msg) |
| { |
| struct osmo_wqueue *wqueue = &fl1h->write_q[MQ_PDTCH_WRITE]; |
| |
| if (osmo_wqueue_enqueue(wqueue, msg) != 0) { |
| LOGP(DL1IF, LOGL_ERROR, "PDTCH queue full. dropping message.\n"); |
| msgb_free(msg); |
| } |
| |
| return 0; |
| } |
| |
| static void *prim_init(GsmL1_Prim_t *prim, GsmL1_PrimId_t id, struct lc15l1_hdl *gl1) |
| { |
| prim->id = id; |
| |
| switch (id) { |
| case GsmL1_PrimId_MphInitReq: |
| //prim->u.mphInitReq.hLayer1 = (HANDLE)gl1->hLayer1; |
| break; |
| case GsmL1_PrimId_MphCloseReq: |
| prim->u.mphCloseReq.hLayer1 = (HANDLE)gl1->hLayer1; |
| break; |
| case GsmL1_PrimId_MphConnectReq: |
| prim->u.mphConnectReq.hLayer1 = (HANDLE)gl1->hLayer1; |
| break; |
| case GsmL1_PrimId_MphDisconnectReq: |
| prim->u.mphDisconnectReq.hLayer1 = (HANDLE)gl1->hLayer1; |
| break; |
| case GsmL1_PrimId_MphActivateReq: |
| prim->u.mphActivateReq.hLayer1 = (HANDLE)gl1->hLayer1; |
| break; |
| case GsmL1_PrimId_MphDeactivateReq: |
| prim->u.mphDeactivateReq.hLayer1 = (HANDLE)gl1->hLayer1; |
| break; |
| case GsmL1_PrimId_MphConfigReq: |
| prim->u.mphConfigReq.hLayer1 = (HANDLE)gl1->hLayer1; |
| break; |
| case GsmL1_PrimId_MphMeasureReq: |
| prim->u.mphMeasureReq.hLayer1 = (HANDLE)gl1->hLayer1; |
| break; |
| case GsmL1_PrimId_MphInitCnf: |
| case GsmL1_PrimId_MphCloseCnf: |
| case GsmL1_PrimId_MphConnectCnf: |
| case GsmL1_PrimId_MphDisconnectCnf: |
| case GsmL1_PrimId_MphActivateCnf: |
| case GsmL1_PrimId_MphDeactivateCnf: |
| case GsmL1_PrimId_MphConfigCnf: |
| case GsmL1_PrimId_MphMeasureCnf: |
| break; |
| case GsmL1_PrimId_MphTimeInd: |
| break; |
| case GsmL1_PrimId_MphSyncInd: |
| break; |
| case GsmL1_PrimId_PhEmptyFrameReq: |
| prim->u.phEmptyFrameReq.hLayer1 = (HANDLE)gl1->hLayer1; |
| break; |
| case GsmL1_PrimId_PhDataReq: |
| prim->u.phDataReq.hLayer1 = (HANDLE)gl1->hLayer1; |
| break; |
| case GsmL1_PrimId_PhConnectInd: |
| break; |
| case GsmL1_PrimId_PhReadyToSendInd: |
| break; |
| case GsmL1_PrimId_PhDataInd: |
| break; |
| case GsmL1_PrimId_PhRaInd: |
| break; |
| default: |
| LOGP(DL1IF, LOGL_ERROR, "unknown L1 primitive %u\n", id); |
| break; |
| } |
| return &prim->u; |
| } |
| |
| /* connect PDTCH */ |
| int l1if_connect_pdch(void *obj, uint8_t ts) |
| { |
| struct lc15l1_hdl *fl1h = obj; |
| struct msgb *msg = l1p_msgb_alloc(); |
| GsmL1_MphConnectReq_t *cr; |
| |
| cr = prim_init(msgb_l1prim(msg), GsmL1_PrimId_MphConnectReq, fl1h); |
| cr->u8Tn = ts; |
| cr->logChComb = GsmL1_LogChComb_XIII; |
| |
| return l1if_req_pdch(fl1h, msg); |
| } |
| |
| static int handle_ph_readytosend_ind(struct lc15l1_hdl *fl1h, |
| GsmL1_PhReadyToSendInd_t *rts_ind) |
| { |
| struct gsm_time g_time; |
| int rc = 0; |
| |
| gsm_fn2gsmtime(&g_time, rts_ind->u32Fn); |
| |
| DEBUGP(DL1IF, "Rx PH-RTS.ind %02u/%02u/%02u SAPI=%s\n", |
| g_time.t1, g_time.t2, g_time.t3, |
| get_value_string(lc15bts_l1sapi_names, rts_ind->sapi)); |
| |
| switch (rts_ind->sapi) { |
| case GsmL1_Sapi_Pdtch: |
| case GsmL1_Sapi_Pacch: |
| rc = pcu_rx_rts_req_pdtch(fl1h->trx_no, rts_ind->u8Tn, |
| rts_ind->u32Fn, rts_ind->u8BlockNbr); |
| break; |
| case GsmL1_Sapi_Ptcch: |
| rc = pcu_rx_rts_req_ptcch(fl1h->trx_no, rts_ind->u8Tn, |
| rts_ind->u32Fn, rts_ind->u8BlockNbr); |
| break; |
| default: |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static void get_meas(struct pcu_l1_meas *meas, const GsmL1_MeasParam_t *l1_meas) |
| { |
| meas->rssi = (int8_t) (l1_meas->fRssi); |
| meas->have_rssi = 1; |
| meas->ber = (uint8_t) (l1_meas->fBer * 100); |
| meas->have_ber = 1; |
| meas->bto = (int16_t) (l1_meas->i16BurstTiming); |
| meas->have_bto = 1; |
| meas->link_qual = (int16_t) (l1_meas->fLinkQuality); |
| meas->have_link_qual = 1; |
| } |
| |
| static int handle_ph_data_ind(struct lc15l1_hdl *fl1h, |
| GsmL1_PhDataInd_t *data_ind, struct msgb *l1p_msg) |
| { |
| int rc = 0; |
| struct pcu_l1_meas meas = {0}; |
| |
| DEBUGP(DL1IF, "Rx PH-DATA.ind %s (hL2 %08x): %s\n", |
| get_value_string(lc15bts_l1sapi_names, data_ind->sapi), |
| data_ind->hLayer2, |
| osmo_hexdump(data_ind->msgUnitParam.u8Buffer, |
| data_ind->msgUnitParam.u8Size)); |
| |
| /* |
| * TODO: Add proper bad frame handling here. This could be used |
| * to switch the used CS. Avoid a crash with the PCU right now |
| * feed "0 - 1" amount of data. |
| */ |
| if (data_ind->msgUnitParam.u8Size == 0) |
| return -1; |
| |
| get_meas(&meas, &data_ind->measParam); |
| bts_update_tbf_ta("PH-DATA", data_ind->u32Fn, fl1h->trx_no, |
| data_ind->u8Tn, sign_qta2ta(meas.bto), false); |
| |
| switch (data_ind->sapi) { |
| case GsmL1_Sapi_Pdtch: |
| case GsmL1_Sapi_Pacch: |
| /* drop incomplete UL block */ |
| if (data_ind->msgUnitParam.u8Buffer[0] |
| != GsmL1_PdtchPlType_Full) |
| break; |
| /* PDTCH / PACCH frame handling */ |
| rc = pcu_rx_data_ind_pdtch(fl1h->trx_no, data_ind->u8Tn, |
| data_ind->msgUnitParam.u8Buffer + 1, |
| data_ind->msgUnitParam.u8Size - 1, |
| data_ind->u32Fn, |
| &meas); |
| break; |
| default: |
| LOGP(DL1IF, LOGL_NOTICE, "Rx PH-DATA.ind for unknown L1 SAPI %s\n", |
| get_value_string(lc15bts_l1sapi_names, data_ind->sapi)); |
| break; |
| } |
| |
| if (rc < 0) { |
| gsmtap_send(fl1h->gsmtap, data_ind->u16Arfcn | GSMTAP_ARFCN_F_UPLINK, |
| data_ind->u8Tn, GSMTAP_CHANNEL_PACCH, 0, |
| data_ind->u32Fn, 0, 0, data_ind->msgUnitParam.u8Buffer+1, |
| data_ind->msgUnitParam.u8Size-1); |
| } |
| |
| return rc; |
| } |
| |
| #define MIN_QUAL_RACH 5.0f |
| |
| static int handle_ph_ra_ind(struct lc15l1_hdl *fl1h, GsmL1_PhRaInd_t *ra_ind) |
| { |
| if (ra_ind->measParam.fLinkQuality < MIN_QUAL_RACH) |
| return 0; |
| |
| DEBUGP(DL1IF, "Rx PH-RA.ind"); |
| |
| switch (ra_ind->sapi) { |
| case GsmL1_Sapi_Pdtch: |
| bts_update_tbf_ta("PH-RA", ra_ind->u32Fn, fl1h->trx_no, ra_ind->u8Tn, |
| qta2ta(ra_ind->measParam.i16BurstTiming), true); |
| break; |
| case GsmL1_Sapi_Ptcch: |
| pcu_rx_rach_ind_pdtch(fl1h->trx_no, ra_ind->u8Tn, ra_ind->u32Fn, |
| ra_ind->measParam.i16BurstTiming); |
| break; |
| default: |
| LOGP(DL1IF, LOGL_NOTICE, "Rx PH-RA.ind for unknown L1 SAPI %s\n", |
| get_value_string(lc15bts_l1sapi_names, ra_ind->sapi)); |
| return -ENOTSUP; |
| } |
| |
| return 0; |
| } |
| |
| |
| /* handle any random indication from the L1 */ |
| int l1if_handle_l1prim(int wq, struct lc15l1_hdl *fl1h, struct msgb *msg) |
| { |
| GsmL1_Prim_t *l1p = msgb_l1prim(msg); |
| int rc = 0; |
| |
| LOGP(DL1IF, LOGL_DEBUG, "Rx L1 prim %s on queue %d\n", |
| get_value_string(lc15bts_l1prim_names, l1p->id), wq); |
| |
| switch (l1p->id) { |
| #if 0 |
| case GsmL1_PrimId_MphTimeInd: |
| rc = handle_mph_time_ind(fl1h, &l1p->u.mphTimeInd); |
| break; |
| case GsmL1_PrimId_MphSyncInd: |
| break; |
| case GsmL1_PrimId_PhConnectInd: |
| break; |
| #endif |
| case GsmL1_PrimId_PhReadyToSendInd: |
| rc = handle_ph_readytosend_ind(fl1h, &l1p->u.phReadyToSendInd); |
| break; |
| case GsmL1_PrimId_PhDataInd: |
| rc = handle_ph_data_ind(fl1h, &l1p->u.phDataInd, msg); |
| break; |
| case GsmL1_PrimId_PhRaInd: |
| rc = handle_ph_ra_ind(fl1h, &l1p->u.phRaInd); |
| break; |
| default: |
| break; |
| } |
| |
| msgb_free(msg); |
| |
| return rc; |
| } |
| |
| int l1if_handle_sysprim(struct lc15l1_hdl *fl1h, struct msgb *msg) |
| { |
| return -ENOTSUP; |
| } |
| |
| /* send packet data request to L1 */ |
| int l1if_pdch_req(void *obj, uint8_t ts, int is_ptcch, uint32_t fn, |
| uint16_t arfcn, uint8_t block_nr, uint8_t *data, uint8_t len) |
| { |
| struct lc15l1_hdl *fl1h = obj; |
| struct msgb *msg; |
| GsmL1_Prim_t *l1p; |
| GsmL1_PhDataReq_t *data_req; |
| GsmL1_MsgUnitParam_t *msu_param; |
| struct gsm_time g_time; |
| |
| gsm_fn2gsmtime(&g_time, fn); |
| |
| DEBUGP(DL1IF, "TX packet data %02u/%02u/%02u is_ptcch=%d ts=%d " |
| "block_nr=%d, arfcn=%d, len=%d\n", g_time.t1, g_time.t2, |
| g_time.t3, is_ptcch, ts, block_nr, arfcn, len); |
| |
| msg = l1p_msgb_alloc(); |
| l1p = msgb_l1prim(msg); |
| l1p->id = GsmL1_PrimId_PhDataReq; |
| data_req = &l1p->u.phDataReq; |
| data_req->hLayer1 = (HANDLE)fl1h->hLayer1; |
| data_req->sapi = (is_ptcch) ? GsmL1_Sapi_Ptcch : GsmL1_Sapi_Pdtch; |
| data_req->subCh = GsmL1_SubCh_NA; |
| data_req->u8BlockNbr = block_nr; |
| data_req->u8Tn = ts; |
| data_req->u32Fn = fn; |
| msu_param = &data_req->msgUnitParam; |
| msu_param->u8Size = len; |
| memcpy(msu_param->u8Buffer, data, len); |
| |
| /* transmit */ |
| if (osmo_wqueue_enqueue(&fl1h->write_q[MQ_PDTCH_WRITE], msg) != 0) { |
| LOGP(DL1IF, LOGL_ERROR, "PDTCH queue full. dropping message.\n"); |
| msgb_free(msg); |
| } |
| |
| return 0; |
| } |
| |
| void *l1if_open_pdch(uint8_t trx_no, uint32_t hlayer1) |
| { |
| struct lc15l1_hdl *fl1h; |
| int rc; |
| |
| fl1h = talloc_zero(tall_pcu_ctx, struct lc15l1_hdl); |
| if (!fl1h) |
| return NULL; |
| |
| fl1h->hLayer1 = hlayer1; |
| fl1h->trx_no = trx_no; |
| /* hardware queues are numbered starting from 0 */ |
| fl1h->hw_info.trx_nr = trx_no; |
| |
| DEBUGP(DL1IF, "PCU: Using TRX HW#%u\n", fl1h->hw_info.trx_nr); |
| |
| rc = l1if_transport_open(MQ_PDTCH_WRITE, fl1h); |
| if (rc < 0) { |
| talloc_free(fl1h); |
| return NULL; |
| } |
| |
| fl1h->gsmtap = gsmtap_source_init("localhost", GSMTAP_UDP_PORT, 1); |
| if (fl1h->gsmtap) |
| gsmtap_source_add_sink(fl1h->gsmtap); |
| |
| return fl1h; |
| } |
| |
| int l1if_close_pdch(void *obj) |
| { |
| struct lc15l1_hdl *fl1h = obj; |
| if (fl1h) |
| l1if_transport_close(MQ_PDTCH_WRITE, fl1h); |
| talloc_free(fl1h); |
| return 0; |
| } |
| |