diff options
Diffstat (limited to 'src/osmo-bts-sysmo/l1_if.c')
| -rw-r--r-- | src/osmo-bts-sysmo/l1_if.c | 1235 |
1 files changed, 560 insertions, 675 deletions
diff --git a/src/osmo-bts-sysmo/l1_if.c b/src/osmo-bts-sysmo/l1_if.c index 0159607a..e2ad500f 100644 --- a/src/osmo-bts-sysmo/l1_if.c +++ b/src/osmo-bts-sysmo/l1_if.c @@ -1,6 +1,6 @@ /* Interface handler for Sysmocom L1 */ -/* (C) 2011 by Harald Welte <laforge@gnumonks.org> +/* (C) 2011-2014 by Harald Welte <laforge@gnumonks.org> * (C) 2014 by Holger Hans Peter Freyther * * All Rights Reserved @@ -33,13 +33,9 @@ #include <osmocom/core/select.h> #include <osmocom/core/timer.h> #include <osmocom/core/write_queue.h> -#include <osmocom/core/gsmtap.h> -#include <osmocom/core/gsmtap_util.h> #include <osmocom/gsm/gsm_utils.h> #include <osmocom/gsm/lapdm.h> -#include <osmocom/trau/osmo_ortp.h> - #include <osmo-bts/logging.h> #include <osmo-bts/bts.h> #include <osmo-bts/oml.h> @@ -51,6 +47,7 @@ #include <osmo-bts/handover.h> #include <osmo-bts/cbch.h> #include <osmo-bts/bts_model.h> +#include <osmo-bts/l1sap.h> #include <sysmocom/femtobts/superfemto.h> #include <sysmocom/femtobts/gsml1prim.h> @@ -70,97 +67,6 @@ extern int pcu_direct; #define MIN_QUAL_RACH 5.0f /* at least 5 dB C/I */ #define MIN_QUAL_NORM -0.5f /* at least -1 dB C/I */ -/* mapping from femtobts L1 SAPI to GSMTAP channel type */ -static const uint8_t l1sapi2gsmtap_cht[GsmL1_Sapi_NUM] = { - [GsmL1_Sapi_Idle] = 255, - [GsmL1_Sapi_Fcch] = 255, - [GsmL1_Sapi_Sch] = 255, - [GsmL1_Sapi_Sacch] = GSMTAP_CHANNEL_SDCCH | GSMTAP_CHANNEL_ACCH, - [GsmL1_Sapi_Sdcch] = GSMTAP_CHANNEL_SDCCH, - [GsmL1_Sapi_Bcch] = GSMTAP_CHANNEL_BCCH, - [GsmL1_Sapi_Pch] = GSMTAP_CHANNEL_PCH, - [GsmL1_Sapi_Agch] = GSMTAP_CHANNEL_AGCH, - [GsmL1_Sapi_Cbch] = GSMTAP_CHANNEL_CBCH51, - [GsmL1_Sapi_Rach] = GSMTAP_CHANNEL_RACH, - [GsmL1_Sapi_TchF] = 255, - [GsmL1_Sapi_FacchF] = GSMTAP_CHANNEL_TCH_F, - [GsmL1_Sapi_TchH] = 255, - [GsmL1_Sapi_FacchH] = GSMTAP_CHANNEL_TCH_H, - [GsmL1_Sapi_Nch] = GSMTAP_CHANNEL_CCCH, - [GsmL1_Sapi_Pdtch] = GSMTAP_CHANNEL_PACCH, - [GsmL1_Sapi_Pacch] = GSMTAP_CHANNEL_PACCH, - [GsmL1_Sapi_Pbcch] = 255, - [GsmL1_Sapi_Pagch] = 255, - [GsmL1_Sapi_Ppch] = 255, - [GsmL1_Sapi_Pnch] = 255, - [GsmL1_Sapi_Ptcch] = GSMTAP_CHANNEL_PTCCH, - [GsmL1_Sapi_Prach] = 255, -}; - -static void tx_to_gsmtap(struct femtol1_hdl *fl1h, struct msgb *msg) -{ - struct gsm_bts_trx *trx = fl1h->priv; - GsmL1_Prim_t *l1p = msgb_l1prim(msg); - GsmL1_PhDataReq_t *data_req = &l1p->u.phDataReq; - - if (fl1h->gsmtap) { - uint8_t ss, chan_type; - if (data_req->subCh == 0x1f) - ss = 0; - else - ss = data_req->subCh; - - if (!(fl1h->gsmtap_sapi_mask & (1 << data_req->sapi))) - return; - - chan_type = l1sapi2gsmtap_cht[data_req->sapi]; - if (chan_type == 255) - return; - - gsmtap_send(fl1h->gsmtap, trx->arfcn, data_req->u8Tn, - chan_type, ss, data_req->u32Fn, 0, 0, - data_req->msgUnitParam.u8Buffer, - data_req->msgUnitParam.u8Size); - } -} - -static void ul_to_gsmtap(struct femtol1_hdl *fl1h, struct msgb *msg) -{ - struct gsm_bts_trx *trx = fl1h->priv; - GsmL1_Prim_t *l1p = msgb_l1prim(msg); - GsmL1_PhDataInd_t *data_ind = &l1p->u.phDataInd; - int skip = 0; - - if (fl1h->gsmtap) { - uint8_t ss, chan_type; - if (data_ind->subCh == 0x1f) - ss = 0; - else - ss = data_ind->subCh; - - if (!(fl1h->gsmtap_sapi_mask & (1 << data_ind->sapi))) - return; - - chan_type = l1sapi2gsmtap_cht[data_ind->sapi]; - if (chan_type == 255) - return; - if (chan_type == GSMTAP_CHANNEL_PACCH - || chan_type == GSMTAP_CHANNEL_PDCH) { - if (data_ind->msgUnitParam.u8Buffer[0] - != GsmL1_PdtchPlType_Full) - return; - skip = 1; - } - - gsmtap_send(fl1h->gsmtap, trx->arfcn | GSMTAP_ARFCN_F_UPLINK, - data_ind->u8Tn, chan_type, ss, data_ind->u32Fn, - data_ind->measParam.fRssi, - data_ind->measParam.fLinkQuality, - data_ind->msgUnitParam.u8Buffer + skip, - data_ind->msgUnitParam.u8Size - skip); - } -} - struct wait_l1_conf { struct llist_head list; /* internal linked list */ @@ -326,19 +232,6 @@ empty_req_from_rts_ind(GsmL1_Prim_t *l1p, return empty_req; } -/* obtain a ptr to the lapdm_channel for a given hLayer2 */ -static struct lapdm_channel * -get_lapdm_chan_by_hl2(struct gsm_bts_trx *trx, uint32_t hLayer2) -{ - struct gsm_lchan *lchan; - - lchan = l1if_hLayer_to_lchan(trx, hLayer2); - if (!lchan) - return NULL; - - return &lchan->lapdm_ch; -} - /* check if the message is a GSM48_MT_RR_CIPH_M_CMD, and if yes, enable * uni-directional de-cryption on the uplink. We need this ugly layering * violation as we have no way of passing down L3 metadata (RSL CIPHERING CMD) @@ -377,31 +270,6 @@ static int check_for_ciph_cmd(struct femtol1_hdl *fl1h, return 1; } -static inline void check_for_first_ciphrd(struct femtol1_hdl *fl1h, - GsmL1_MsgUnitParam_t *msgUnitParam, - struct gsm_lchan *lchan) -{ - uint8_t n_s; - - /* if this is the first valid message after enabling Rx - * decryption, we have to enable Tx encryption */ - if (lchan->ciph_state != LCHAN_CIPH_RX_CONF) - return; - - /* HACK: check if it's an I frame, in order to - * ignore some still buffered/queued UI frames received - * before decryption was enabled */ - if (msgUnitParam->u8Buffer[0] != 0x01) - return; - if ((msgUnitParam->u8Buffer[1] & 0x01) != 0) - return; - n_s = msgUnitParam->u8Buffer[1] >> 5; - if (lchan->ciph_ns != n_s) - return; - lchan->ciph_state = LCHAN_CIPH_TXRX_REQ; - l1if_set_ciphering(fl1h, lchan, 1); -} - /* public helpers for the test */ int bts_check_for_ciph_cmd(struct femtol1_hdl *fl1h, struct msgb *msg, struct gsm_lchan *lchan) @@ -409,34 +277,482 @@ int bts_check_for_ciph_cmd(struct femtol1_hdl *fl1h, return check_for_ciph_cmd(fl1h, msg, lchan); } -void bts_check_for_first_ciphrd(struct femtol1_hdl *fl1h, - GsmL1_MsgUnitParam_t *msgUnitParam, - struct gsm_lchan *lchan) -{ - return check_for_first_ciphrd(fl1h, msgUnitParam, lchan); -} - static const uint8_t fill_frame[GSM_MACBLOCK_LEN] = { 0x03, 0x03, 0x01, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B }; +/* fill PH-DATA.req from l1sap primitive */ +static GsmL1_PhDataReq_t * +data_req_from_l1sap(GsmL1_Prim_t *l1p, struct femtol1_hdl *fl1, + uint8_t tn, uint32_t fn, uint8_t sapi, uint8_t sub_ch, + uint8_t block_nr, uint8_t len) +{ + GsmL1_PhDataReq_t *data_req = &l1p->u.phDataReq; + + l1p->id = GsmL1_PrimId_PhDataReq; + + /* copy fields from PH-RSS.ind */ + data_req->hLayer1 = fl1->hLayer1; + data_req->u8Tn = tn; + data_req->u32Fn = fn; + data_req->sapi = sapi; + data_req->subCh = sub_ch; + data_req->u8BlockNbr = block_nr; + + data_req->msgUnitParam.u8Size = len; + + return data_req; +} + +/* fill PH-EMPTY_FRAME.req from l1sap primitive */ +static GsmL1_PhEmptyFrameReq_t * +empty_req_from_l1sap(GsmL1_Prim_t *l1p, struct femtol1_hdl *fl1, + uint8_t tn, uint32_t fn, uint8_t sapi, + uint8_t subch, uint8_t block_nr) +{ + GsmL1_PhEmptyFrameReq_t *empty_req = &l1p->u.phEmptyFrameReq; + + l1p->id = GsmL1_PrimId_PhEmptyFrameReq; + + empty_req->hLayer1 = fl1->hLayer1; + empty_req->u8Tn = tn; + empty_req->u32Fn = fn; + empty_req->sapi = sapi; + empty_req->subCh = subch; + empty_req->u8BlockNbr = block_nr; + + return empty_req; +} + +static int ph_data_req(struct gsm_bts_trx *trx, struct msgb *msg, + struct osmo_phsap_prim *l1sap) +{ + struct femtol1_hdl *fl1 = trx_femtol1_hdl(trx); + uint32_t u32Fn; + uint8_t u8Tn, subCh, u8BlockNbr = 0, sapi = 0; + uint8_t chan_nr, link_id; + GsmL1_Prim_t *l1p; + int len; + + if (!msg) { + LOGP(DL1C, LOGL_FATAL, "PH-DATA.req without msg. " + "Please fix!\n"); + abort(); + } + chan_nr = l1sap->u.data.chan_nr; + link_id = l1sap->u.data.link_id; + u32Fn = l1sap->u.data.fn; + u8Tn = L1SAP_CHAN2TS(chan_nr); + subCh = 0x1f; + if (L1SAP_IS_LINK_SACCH(link_id)) { + sapi = GsmL1_Sapi_Sacch; + if (!L1SAP_IS_CHAN_TCHF(chan_nr)) + subCh = l1sap_chan2ss(chan_nr); + } else if (L1SAP_IS_CHAN_TCHF(chan_nr)) { + if (trx->ts[u8Tn].pchan == GSM_PCHAN_PDCH) { + if (L1SAP_IS_PTCCH(u32Fn)) { + sapi = GsmL1_Sapi_Ptcch; + u8BlockNbr = L1SAP_FN2PTCCHBLOCK(u32Fn); + } else { + sapi = GsmL1_Sapi_Pdtch; + u8BlockNbr = L1SAP_FN2MACBLOCK(u32Fn); + } + } else { + sapi = GsmL1_Sapi_FacchF; + u8BlockNbr = (u32Fn % 13) >> 2; + } + } else if (L1SAP_IS_CHAN_TCHH(chan_nr)) { + subCh = L1SAP_CHAN2SS_TCHH(chan_nr); + sapi = GsmL1_Sapi_FacchH; + u8BlockNbr = (u32Fn % 26) >> 3; + } else if (L1SAP_IS_CHAN_SDCCH4(chan_nr)) { + subCh = L1SAP_CHAN2SS_SDCCH4(chan_nr); + sapi = GsmL1_Sapi_Sdcch; + } else if (L1SAP_IS_CHAN_SDCCH8(chan_nr)) { + subCh = L1SAP_CHAN2SS_SDCCH8(chan_nr); + sapi = GsmL1_Sapi_Sdcch; + } else if (L1SAP_IS_CHAN_BCCH(chan_nr)) { + sapi = GsmL1_Sapi_Bcch; + } else if (L1SAP_IS_CHAN_AGCH_PCH(chan_nr)) { + /* The sapi depends on DSP configuration, not + * on the actual SYSTEM INFORMATION 3. */ + u8BlockNbr = L1SAP_FN2CCCHBLOCK(u32Fn); + if (u8BlockNbr >= 1) + sapi = GsmL1_Sapi_Pch; + else + sapi = GsmL1_Sapi_Agch; + } else { + LOGP(DL1C, LOGL_NOTICE, "unknown prim %d op %d " + "chan_nr %d link_id %d\n", l1sap->oph.primitive, + l1sap->oph.operation, chan_nr, link_id); + return -EINVAL; + } + + /* pull and trim msg to start of payload */ + msgb_pull(msg, sizeof(*l1sap)); + len = msg->len; + msgb_trim(msg, 0); + + /* convert l1sap message to GsmL1 primitive, keep payload */ + if (len) { + /* data request */ + + /* wrap zeroed l1p structure arrount payload + * this must be done in three steps, since the actual + * payload is not at the end but inside the l1p structure. */ + msgb_push(msg, offsetof(GsmL1_Prim_t, u.phDataReq.msgUnitParam.u8Buffer)); + memset(msg->data, 0, msg->len); + msgb_put(msg, len); + memset(msg->tail, 0, sizeof(*l1p) - msg->len); + msgb_put(msg, sizeof(*l1p) - msg->len); + msg->l1h = msg->data; + + l1p = msgb_l1prim(msg); + data_req_from_l1sap(l1p, fl1, u8Tn, u32Fn, sapi, subCh, u8BlockNbr, len); + } else { + /* empty frame */ + + /* put l1p structure */ + msgb_put(msg, sizeof(*l1p)); + memset(msg->data, 0, msg->len); + msg->l1h = msg->data; + + l1p = msgb_l1prim(msg); + empty_req_from_l1sap(l1p, fl1, u8Tn, u32Fn, sapi, subCh, u8BlockNbr); + } + + /* send message to DSP's queue */ + if (osmo_wqueue_enqueue(&fl1->write_q[MQ_L1_WRITE], msg) != 0) { + LOGP(DL1P, LOGL_ERROR, "MQ_L1_WRITE queue full. Dropping msg.\n"); + msgb_free(msg); + } + + return 0; +} + +static int ph_tch_req(struct gsm_bts_trx *trx, struct msgb *msg, + struct osmo_phsap_prim *l1sap) +{ + struct femtol1_hdl *fl1 = trx_femtol1_hdl(trx); + struct gsm_lchan *lchan; + uint32_t u32Fn; + uint8_t u8Tn, subCh, u8BlockNbr = 0, sapi, ss; + uint8_t chan_nr; + GsmL1_Prim_t *l1p; + struct msgb *nmsg = NULL; + + chan_nr = l1sap->u.tch.chan_nr; + u32Fn = l1sap->u.tch.fn; + u8Tn = L1SAP_CHAN2TS(chan_nr); + u8BlockNbr = (u32Fn % 13) >> 2; + if (L1SAP_IS_CHAN_TCHH(chan_nr)) { + ss = subCh = L1SAP_CHAN2SS_TCHH(chan_nr); + sapi = GsmL1_Sapi_TchH; + } else { + subCh = 0x1f; + ss = 0; + sapi = GsmL1_Sapi_TchF; + } + + lchan = &trx->ts[u8Tn].lchan[ss]; + + /* create new message and fill data */ + if (msg) { + msgb_pull(msg, sizeof(*l1sap)); + /* create new message */ + nmsg = l1p_msgb_alloc(); + if (!nmsg) + return -ENOMEM; + l1p = msgb_l1prim(nmsg); + l1if_tch_encode(lchan, + l1p->u.phDataReq.msgUnitParam.u8Buffer, + &l1p->u.phDataReq.msgUnitParam.u8Size, + msg->data, msg->len); + } + + /* no message/data, we generate an empty traffic msg */ + if (!nmsg) + nmsg = gen_empty_tch_msg(lchan); + + /* no traffic message, we generate an empty msg */ + if (!nmsg) { + nmsg = l1p_msgb_alloc(); + if (!nmsg) + return -ENOMEM; + } + + l1p = msgb_l1prim(nmsg); + + /* if we provide data, or if data is already in nmsg */ + if (l1p->u.phDataReq.msgUnitParam.u8Size) { + /* data request */ + data_req_from_l1sap(l1p, fl1, u8Tn, u32Fn, sapi, subCh, + u8BlockNbr, + l1p->u.phDataReq.msgUnitParam.u8Size); + } else { + /* empty frame */ + empty_req_from_l1sap(l1p, fl1, u8Tn, u32Fn, sapi, subCh, u8BlockNbr); + } + /* send message to DSP's queue */ + osmo_wqueue_enqueue(&fl1->write_q[MQ_L1_WRITE], nmsg); + + msgb_free(msg); + return 0; +} + +static int mph_info_req(struct gsm_bts_trx *trx, struct msgb *msg, + struct osmo_phsap_prim *l1sap) +{ + struct femtol1_hdl *fl1 = trx_femtol1_hdl(trx); + uint8_t u8Tn, ss; + uint8_t chan_nr; + struct gsm_lchan *lchan; + int rc = 0; + + switch (l1sap->u.info.type) { + case PRIM_INFO_ACT_CIPH: + chan_nr = l1sap->u.info.u.ciph_req.chan_nr; + u8Tn = L1SAP_CHAN2TS(chan_nr); + ss = l1sap_chan2ss(chan_nr); + lchan = &trx->ts[u8Tn].lchan[ss]; + if (l1sap->u.info.u.ciph_req.uplink) { + l1if_set_ciphering(fl1, lchan, 0); + lchan->ciph_state = LCHAN_CIPH_RX_REQ; + } + if (l1sap->u.info.u.ciph_req.downlink) { + l1if_set_ciphering(fl1, lchan, 1); + lchan->ciph_state = LCHAN_CIPH_RX_CONF_TX_REQ; + } + if (l1sap->u.info.u.ciph_req.downlink + && l1sap->u.info.u.ciph_req.uplink) + lchan->ciph_state = LCHAN_CIPH_RXTX_REQ; + break; + case PRIM_INFO_ACTIVATE: + case PRIM_INFO_DEACTIVATE: + case PRIM_INFO_MODIFY: + chan_nr = l1sap->u.info.u.act_req.chan_nr; + u8Tn = L1SAP_CHAN2TS(chan_nr); + ss = l1sap_chan2ss(chan_nr); + lchan = &trx->ts[u8Tn].lchan[ss]; + if (l1sap->u.info.type == PRIM_INFO_ACTIVATE) + l1if_rsl_chan_act(lchan); + else if (l1sap->u.info.type == PRIM_INFO_MODIFY) { + if (lchan->ho.active == HANDOVER_WAIT_FRAME) + l1if_rsl_chan_mod(lchan); + else + l1if_rsl_mode_modify(lchan); + } else if (l1sap->u.info.u.act_req.sacch_only) + l1if_rsl_deact_sacch(lchan); + else + l1if_rsl_chan_rel(lchan); + msgb_free(msg); + break; + default: + LOGP(DL1C, LOGL_NOTICE, "unknown MPH-INFO.req %d\n", + l1sap->u.info.type); + rc = -EINVAL; + } + + return rc; +} + +/* primitive from common part */ +int bts_model_l1sap_down(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap) +{ + struct msgb *msg = l1sap->oph.msg; + int rc = 0; + + switch (OSMO_PRIM_HDR(&l1sap->oph)) { + case OSMO_PRIM(PRIM_PH_DATA, PRIM_OP_REQUEST): + rc = ph_data_req(trx, msg, l1sap); + break; + case OSMO_PRIM(PRIM_TCH, PRIM_OP_REQUEST): + rc = ph_tch_req(trx, msg, l1sap); + break; + case OSMO_PRIM(PRIM_MPH_INFO, PRIM_OP_REQUEST): + rc = mph_info_req(trx, msg, l1sap); + break; + default: + LOGP(DL1C, LOGL_NOTICE, "unknown prim %d op %d\n", + l1sap->oph.primitive, l1sap->oph.operation); + rc = -EINVAL; + } + + if (rc) + msgb_free(msg); + return rc; +} + +static int handle_mph_time_ind(struct femtol1_hdl *fl1, + GsmL1_MphTimeInd_t *time_ind) +{ + struct gsm_bts_trx *trx = fl1->priv; + struct gsm_bts *bts = trx->bts; + struct osmo_phsap_prim l1sap; + uint32_t fn; + + /* increment the primitive count for the alive timer */ + fl1->alive_prim_cnt++; + + /* ignore every time indication, except for c0 */ + if (trx != bts->c0) { + return 0; + } + + fn = time_ind->u32Fn; + + memset(&l1sap, 0, sizeof(l1sap)); + osmo_prim_init(&l1sap.oph, SAP_GSM_PH, PRIM_MPH_INFO, + PRIM_OP_INDICATION, NULL); + l1sap.u.info.type = PRIM_INFO_TIME; + l1sap.u.info.u.time_ind.fn = fn; + + return l1sap_up(trx, &l1sap); +} + +static uint8_t chan_nr_by_sapi(enum gsm_phys_chan_config pchan, + GsmL1_Sapi_t sapi, GsmL1_SubCh_t subCh, + uint8_t u8Tn, uint32_t u32Fn) +{ + uint8_t cbits = 0; + switch (sapi) { + case GsmL1_Sapi_Bcch: + cbits = 0x10; + break; + case GsmL1_Sapi_Sacch: + switch(pchan) { + case GSM_PCHAN_TCH_F: + cbits = 0x01; + break; + case GSM_PCHAN_TCH_H: + cbits = 0x02 + subCh; + break; + case GSM_PCHAN_CCCH_SDCCH4: + cbits = 0x04 + subCh; + break; + case GSM_PCHAN_SDCCH8_SACCH8C: + cbits = 0x08 + subCh; + break; + default: + LOGP(DL1C, LOGL_ERROR, "SACCH for pchan %d?\n", + pchan); + return 0; + } + break; + case GsmL1_Sapi_Sdcch: + switch(pchan) { + case GSM_PCHAN_CCCH_SDCCH4: + cbits = 0x04 + subCh; + break; + case GSM_PCHAN_SDCCH8_SACCH8C: + cbits = 0x08 + subCh; + break; + default: + LOGP(DL1C, LOGL_ERROR, "SDCCH for pchan %d?\n", + pchan); + return 0; + } + break; + case GsmL1_Sapi_Agch: + case GsmL1_Sapi_Pch: + cbits = 0x12; + break; + case GsmL1_Sapi_Pdtch: + case GsmL1_Sapi_Pacch: + switch(pchan) { + case GSM_PCHAN_PDCH: + cbits = 0x01; + break; + default: + LOGP(DL1C, LOGL_ERROR, "PDTCH for pchan %d?\n", + pchan); + return 0; + } + break; + case GsmL1_Sapi_TchF: + cbits = 0x01; + break; + case GsmL1_Sapi_TchH: + cbits = 0x02 + subCh; + break; + case GsmL1_Sapi_FacchF: + cbits = 0x01; + break; + case GsmL1_Sapi_FacchH: + cbits = 0x02 + subCh; + break; + case GsmL1_Sapi_Ptcch: + if (!L1SAP_IS_PTCCH(u32Fn)) { + LOGP(DL1C, LOGL_FATAL, "Not expecting PTCCH at frame " + "number other than 12, got it at %u (%u). " + "Please fix!\n", u32Fn % 52, u32Fn); + abort(); + } + switch(pchan) { + case GSM_PCHAN_PDCH: + cbits = 0x01; + break; + default: + LOGP(DL1C, LOGL_ERROR, "PTCCH for pchan %d?\n", + pchan); + return 0; + } + break; + default: + return 0; + } + + /* not reached due to default case above */ + return (cbits << 3) | u8Tn; +} + static int handle_ph_readytosend_ind(struct femtol1_hdl *fl1, - GsmL1_PhReadyToSendInd_t *rts_ind) + GsmL1_PhReadyToSendInd_t *rts_ind, + struct msgb *l1p_msg) { struct gsm_bts_trx *trx = fl1->priv; struct gsm_bts *bts = trx->bts; struct msgb *resp_msg; GsmL1_PhDataReq_t *data_req; GsmL1_MsgUnitParam_t *msu_param; - struct lapdm_entity *le; - struct gsm_lchan *lchan; struct gsm_time g_time; uint32_t t3p; - uint8_t *si; - struct osmo_phsap_prim pp; int rc; + struct osmo_phsap_prim *l1sap; + uint8_t chan_nr, link_id; + uint32_t fn; + + /* check if primitive should be handled by common part */ + chan_nr = chan_nr_by_sapi(trx->ts[rts_ind->u8Tn].pchan, rts_ind->sapi, + rts_ind->subCh, rts_ind->u8Tn, rts_ind->u32Fn); + if (chan_nr) { + fn = rts_ind->u32Fn; + if (rts_ind->sapi == GsmL1_Sapi_Sacch) + link_id = 0x40; + else + link_id = 0; + rc = msgb_trim(l1p_msg, sizeof(*l1sap)); + if (rc < 0) + MSGB_ABORT(l1p_msg, "No room for primitive\n"); + l1sap = msgb_l1sap_prim(l1p_msg); + if (rts_ind->sapi == GsmL1_Sapi_TchF + || rts_ind->sapi == GsmL1_Sapi_TchH) { + osmo_prim_init(&l1sap->oph, SAP_GSM_PH, PRIM_TCH_RTS, + PRIM_OP_INDICATION, l1p_msg); + l1sap->u.tch.chan_nr = chan_nr; + l1sap->u.tch.fn = fn; + } else { + osmo_prim_init(&l1sap->oph, SAP_GSM_PH, PRIM_PH_RTS, + PRIM_OP_INDICATION, l1p_msg); + l1sap->u.data.link_id = link_id; + l1sap->u.data.chan_nr = chan_nr; + l1sap->u.data.fn = fn; + } + + return l1sap_up(trx, l1sap); + } gsm_fn2gsmtime(&g_time, rts_ind->u32Fn); @@ -444,57 +760,6 @@ static int handle_ph_readytosend_ind(struct femtol1_hdl *fl1, g_time.t1, g_time.t2, g_time.t3, get_value_string(femtobts_l1sapi_names, rts_ind->sapi)); - /* In case of TCH downlink trasnmission, we already have a l1 - * primitive msgb pre-allocated and pre-formatted in the - * dl_tch_queue. All we need to do is to pull it off the queue - * and transmit it */ - switch (rts_ind->sapi) { - case GsmL1_Sapi_TchF: - case GsmL1_Sapi_TchH: - /* resolve the L2 entity using rts_ind->hLayer2 */ - lchan = l1if_hLayer_to_lchan(trx, rts_ind->hLayer2); - if (!lchan) - break; - - if (!lchan->loopback && lchan->abis_ip.rtp_socket) { - osmo_rtp_socket_poll(lchan->abis_ip.rtp_socket); - /* FIXME: we _assume_ that we never miss TDMA - * frames and that we always get to this point - * for every to-be-transmitted voice frame. A - * better solution would be to compute - * rx_user_ts based on how many TDMA frames have - * elapsed since the last call */ - lchan->abis_ip.rtp_socket->rx_user_ts += GSM_RTP_DURATION; - } - /* get a msgb from the dl_tx_queue */ - resp_msg = msgb_dequeue(&lchan->dl_tch_queue); - /* if there is none, try to generate empty TCH frame - * like AMR SID_BAD */ - if (!resp_msg) { - LOGP(DL1C, LOGL_DEBUG, "%s DL TCH Tx queue underrun\n", - gsm_lchan_name(lchan)); - resp_msg = gen_empty_tch_msg(lchan); - /* if there really is none, break here and send empty */ - if (!resp_msg) - break; - } - - /* fill header */ - data_req_from_rts_ind(msgb_l1prim(resp_msg), rts_ind); - /* actually transmit it */ - goto tx; - break; - case GsmL1_Sapi_Pdtch: - case GsmL1_Sapi_Pacch: - return pcu_tx_rts_req(&trx->ts[rts_ind->u8Tn], 0, - rts_ind->u32Fn, rts_ind->u16Arfcn, rts_ind->u8BlockNbr); - case GsmL1_Sapi_Ptcch: - return pcu_tx_rts_req(&trx->ts[rts_ind->u8Tn], 1, - rts_ind->u32Fn, rts_ind->u16Arfcn, rts_ind->u8BlockNbr); - default: - break; - } - /* in all other cases, we need to allocate a new PH-DATA.ind * primitive msgb and start to fill it */ resp_msg = l1p_msgb_alloc(); @@ -515,83 +780,6 @@ static int handle_ph_readytosend_ind(struct femtol1_hdl *fl1, msu_param->u8Buffer[2] = (g_time.t1 << 7) | (g_time.t2 << 2) | (t3p >> 1); msu_param->u8Buffer[3] = (t3p & 1); break; - case GsmL1_Sapi_Bcch: - /* get them from bts->si_buf[] */ - si = bts_sysinfo_get(bts, &g_time); - if (si) - memcpy(msu_param->u8Buffer, si, GSM_MACBLOCK_LEN); - else - memcpy(msu_param->u8Buffer, fill_frame, GSM_MACBLOCK_LEN); - break; - case GsmL1_Sapi_Sacch: - /* resolve the L2 entity using rts_ind->hLayer2 */ - lchan = l1if_hLayer_to_lchan(trx, rts_ind->hLayer2); - le = &lchan->lapdm_ch.lapdm_acch; - /* - * if the DSP is taking care of power control, - * then this value will be overridden. - */ - msu_param->u8Buffer[0] = lchan->ms_power_ctrl.current; - msu_param->u8Buffer[1] = lchan->rqd_ta; - rc = lapdm_phsap_dequeue_prim(le, &pp); - if (rc < 0) { - /* No SACCH data from LAPDM pending, send SACCH filling */ - uint8_t *si = lchan_sacch_get(lchan); - if (si) { - /* +2 to not overwrite the ms_power/ta values */ - memcpy(msu_param->u8Buffer+2, si, GSM_MACBLOCK_LEN-2); - } else { - /* +2 to not overwrite the ms_power/ta values */ - memcpy(msu_param->u8Buffer+2, fill_frame, GSM_MACBLOCK_LEN-2); - } - } else { - /* +2 to not overwrite the ms_power/ta values */ - memcpy(msu_param->u8Buffer+2, pp.oph.msg->data + 2, GSM_MACBLOCK_LEN-2); - msgb_free(pp.oph.msg); - } - break; - case GsmL1_Sapi_Sdcch: - /* resolve the L2 entity using rts_ind->hLayer2 */ - lchan = l1if_hLayer_to_lchan(trx, rts_ind->hLayer2); - le = &lchan->lapdm_ch.lapdm_dcch; - rc = lapdm_phsap_dequeue_prim(le, &pp); - if (rc < 0) - memcpy(msu_param->u8Buffer, fill_frame, GSM_MACBLOCK_LEN); - else { - memcpy(msu_param->u8Buffer, pp.oph.msg->data, GSM_MACBLOCK_LEN); - /* check if it is a RR CIPH MODE CMD. if yes, enable RX ciphering */ - check_for_ciph_cmd(fl1, pp.oph.msg, lchan); - msgb_free(pp.oph.msg); - } - break; - case GsmL1_Sapi_Agch: - case GsmL1_Sapi_Pch: - rc = bts_ccch_copy_msg(bts, msu_param->u8Buffer, &g_time, - rts_ind->sapi == GsmL1_Sapi_Agch); - if (rc <= 0) - memcpy(msu_param->u8Buffer, fill_frame, GSM_MACBLOCK_LEN); - break; - case GsmL1_Sapi_TchF: - case GsmL1_Sapi_TchH: - /* only hit in case we have a RTP underflow, as real TCH - * frames are handled way above */ - goto empty_frame; - break; - case GsmL1_Sapi_FacchF: - case GsmL1_Sapi_FacchH: - /* resolve the L2 entity using rts_ind->hLayer2 */ - lchan = l1if_hLayer_to_lchan(trx, rts_ind->hLayer2); - le = &lchan->lapdm_ch.lapdm_dcch; - rc = lapdm_phsap_dequeue_prim(le, &pp); - if (rc < 0) - goto empty_frame; - else { - memcpy(msu_param->u8Buffer, pp.oph.msg->data, GSM_MACBLOCK_LEN); - /* check if it is a RR CIPH MODE CMD. if yes, enable RX ciphering */ - check_for_ciph_cmd(fl1, pp.oph.msg, lchan); - msgb_free(pp.oph.msg); - } - break; case GsmL1_Sapi_Prach: goto empty_frame; break; @@ -605,14 +793,13 @@ static int handle_ph_readytosend_ind(struct femtol1_hdl *fl1, } tx: - tx_to_gsmtap(fl1, resp_msg); - /* transmit */ if (osmo_wqueue_enqueue(&fl1->write_q[MQ_L1_WRITE], resp_msg) != 0) { LOGP(DL1C, LOGL_ERROR, "MQ_L1_WRITE queue full. Dropping msg.\n"); msgb_free(resp_msg); } + msgb_free(l1p_msg); return 0; empty_frame: @@ -622,65 +809,6 @@ empty_frame: goto tx; } -static int handle_mph_time_ind(struct femtol1_hdl *fl1, - GsmL1_MphTimeInd_t *time_ind) -{ - struct gsm_bts_trx *trx = fl1->priv; - struct gsm_bts *bts = trx->bts; - struct gsm_bts_role_bts *btsb = bts->role; - - int frames_expired = time_ind->u32Fn - fl1->gsm_time.fn; - - /* update time on PCU interface */ - pcu_tx_time_ind(time_ind->u32Fn); - - /* Update our data structures with the current GSM time */ - gsm_fn2gsmtime(&fl1->gsm_time, time_ind->u32Fn); - - /* check if the measurement period of some lchan has ended - * and pre-compute the respective measurement */ - trx_meas_check_compute(fl1->priv, time_ind->u32Fn -1); - - /* increment the primitive count for the alive timer */ - fl1->alive_prim_cnt++; - - /* increment number of RACH slots that have passed by since the - * last time indication */ - if (trx == bts->c0) { - unsigned int num_rach_per_frame; - /* 27 / 51 taken from TS 05.01 Figure 3 */ - if (bts->c0->ts[0].pchan == GSM_PCHAN_CCCH_SDCCH4) - num_rach_per_frame = 27; - else - num_rach_per_frame = 51; - - btsb->load.rach.total += frames_expired * num_rach_per_frame; - } - - return 0; -} - -/* determine LAPDm entity inside LAPDm channel for given L1 sapi */ -static struct lapdm_entity *le_by_l1_sapi(struct lapdm_channel *lc, GsmL1_Sapi_t sapi) -{ - switch (sapi) { - case GsmL1_Sapi_Sacch: - return &lc->lapdm_acch; - default: - return &lc->lapdm_dcch; - } -} - -static uint8_t gen_link_id(GsmL1_Sapi_t l1_sapi, uint8_t lapdm_sapi) -{ - uint8_t c_bits = 0; - - if (l1_sapi == GsmL1_Sapi_Sacch) - c_bits = 0x40; - - return c_bits | (lapdm_sapi & 7); -} - static void dump_meas_res(int ll, GsmL1_MeasParam_t *m) { LOGPC(DL1C, ll, ", Meas: RSSI %-3.2f dBm, Qual %-3.2f dB, " @@ -688,79 +816,50 @@ static void dump_meas_res(int ll, GsmL1_MeasParam_t *m) m->fBer, m->i16BurstTiming); } -static int process_meas_res(struct gsm_lchan *lchan, GsmL1_MeasParam_t *m) -{ - struct bts_ul_meas ulm; - - /* in the GPRS case we are not interested in measurement - * processing. The PCU will take care of it */ - if (lchan->type == GSM_LCHAN_PDTCH) - return 0; - - ulm.ta_offs_qbits = m->i16BurstTiming; - ulm.ber10k = (unsigned int) (m->fBer * 100); - ulm.inv_rssi = (uint8_t) (m->fRssi * -1); - - return lchan_new_ul_meas(lchan, &ulm); -} - -/* process radio link timeout counter S */ -static void radio_link_timeout(struct gsm_lchan *lchan, int bad_frame) +static int process_meas_res(struct gsm_bts_trx *trx, uint8_t chan_nr, + GsmL1_MeasParam_t *m) { - struct gsm_bts_role_bts *btsb = lchan->ts->trx->bts->role; - - /* if link loss criterion already reached */ - if (lchan->s == 0) { - DEBUGP(DMEAS, "%s radio link counter S already 0.\n", - gsm_lchan_name(lchan)); - return; - } - - if (bad_frame) { - /* count down radio link counter S */ - lchan->s--; - DEBUGP(DMEAS, "%s counting down radio link counter S=%d\n", - gsm_lchan_name(lchan), lchan->s); - if (lchan->s == 0) - rsl_tx_conn_fail(lchan, RSL_ERR_RADIO_LINK_FAIL); - return; - } - - if (lchan->s < btsb->radio_link_timeout) { - /* count up radio link counter S */ - lchan->s += 2; - if (lchan->s > btsb->radio_link_timeout) - lchan->s = btsb->radio_link_timeout; - DEBUGP(DMEAS, "%s counting up radio link counter S=%d\n", - gsm_lchan_name(lchan), lchan->s); - } + struct osmo_phsap_prim l1sap; + memset(&l1sap, 0, sizeof(l1sap)); + osmo_prim_init(&l1sap.oph, SAP_GSM_PH, PRIM_MPH_INFO, + PRIM_OP_INDICATION, NULL); + l1sap.u.info.type = PRIM_INFO_MEAS; + l1sap.u.info.u.meas_ind.chan_nr = chan_nr; + l1sap.u.info.u.meas_ind.ta_offs_qbits = m->i16BurstTiming; + l1sap.u.info.u.meas_ind.ber10k = (unsigned int) (m->fBer * 100); + l1sap.u.info.u.meas_ind.inv_rssi = (uint8_t) (m->fRssi * -1); + + return l1sap_up(trx, &l1sap); } static int handle_ph_data_ind(struct femtol1_hdl *fl1, GsmL1_PhDataInd_t *data_ind, struct msgb *l1p_msg) { struct gsm_bts_trx *trx = fl1->priv; - struct osmo_phsap_prim pp; - struct gsm_lchan *lchan; - struct lapdm_entity *le; - struct msgb *msg; + uint8_t chan_nr, link_id; + struct osmo_phsap_prim *l1sap; + uint32_t fn; + uint8_t *data, len; int rc = 0; - ul_to_gsmtap(fl1, l1p_msg); - - lchan = l1if_hLayer_to_lchan(fl1->priv, data_ind->hLayer2); - if (!lchan) { - LOGP(DL1C, LOGL_ERROR, - "unable to resolve lchan by hLayer2 for 0x%x\n", - data_ind->hLayer2); - return -ENODEV; + chan_nr = chan_nr_by_sapi(trx->ts[data_ind->u8Tn].pchan, data_ind->sapi, + data_ind->subCh, data_ind->u8Tn, data_ind->u32Fn); + if (!chan_nr) { + LOGP(DL1C, LOGL_ERROR, "PH-DATA-INDICATION for unknown sapi " + "%d\n", data_ind->sapi); + msgb_free(l1p_msg); + return ENOTSUP; } + fn = data_ind->u32Fn; + link_id = (data_ind->sapi == GsmL1_Sapi_Sacch) ? 0x40 : 0x00; - process_meas_res(lchan, &data_ind->measParam); + process_meas_res(trx, chan_nr, &data_ind->measParam); if (data_ind->measParam.fLinkQuality < fl1->min_qual_norm - && data_ind->msgUnitParam.u8Size != 0) + && data_ind->msgUnitParam.u8Size != 0) { + msgb_free(l1p_msg); return 0; + } DEBUGP(DL1C, "Rx PH-DATA.ind %s (hL2 %08x): %s", get_value_string(femtobts_l1sapi_names, data_ind->sapi), @@ -769,195 +868,96 @@ static int handle_ph_data_ind(struct femtol1_hdl *fl1, GsmL1_PhDataInd_t *data_i data_ind->msgUnitParam.u8Size)); dump_meas_res(LOGL_DEBUG, &data_ind->measParam); - if (lchan->ho.active == HANDOVER_WAIT_FRAME) - handover_frame(lchan); - - switch (data_ind->sapi) { - case GsmL1_Sapi_Sacch: - radio_link_timeout(lchan, (data_ind->msgUnitParam.u8Size == 0)); - if (data_ind->msgUnitParam.u8Size == 0) - break; - /* save the SACCH L1 header in the lchan struct for RSL MEAS RES */ - if (data_ind->msgUnitParam.u8Size < 2) { - LOGP(DL1C, LOGL_NOTICE, "SACCH with size %u<2 !?!\n", - data_ind->msgUnitParam.u8Size); - break; - } - - /* - * Handle power control - */ - l1if_ms_pwr_ctrl(lchan, fl1->ul_power_target, - data_ind->msgUnitParam.u8Buffer[0] & 0x1f, - data_ind->measParam.fRssi); - - /* Some brilliant engineer decided that the ordering of - * fields on the Um interface is different from the - * order of fields in RLS. See TS 04.04 (Chapter 7.2) - * vs. TS 08.58 (Chapter 9.3.10). */ - lchan->meas.l1_info[0] = data_ind->msgUnitParam.u8Buffer[0] << 3; - lchan->meas.l1_info[0] |= ((data_ind->msgUnitParam.u8Buffer[0] >> 5) & 1) << 2; - lchan->meas.l1_info[1] = data_ind->msgUnitParam.u8Buffer[1]; - lchan->meas.flags |= LC_UL_M_F_L1_VALID; - /* fall-through */ - case GsmL1_Sapi_Sdcch: - case GsmL1_Sapi_FacchF: - case GsmL1_Sapi_FacchH: - /* Check and Re-check for the SACCH */ - if (data_ind->msgUnitParam.u8Size == 0) { - LOGP(DL1C, LOGL_NOTICE, "%s %s data is null.\n", - gsm_lchan_name(lchan), - get_value_string(femtobts_l1sapi_names, data_ind->sapi)); - break; - } - - check_for_first_ciphrd(fl1, &data_ind->msgUnitParam, lchan); - - /* SDCCH, SACCH and FACCH all go to LAPDm */ - le = le_by_l1_sapi(&lchan->lapdm_ch, data_ind->sapi); - /* allocate and fill LAPDm primitive */ - msg = msgb_alloc_headroom(128, 64, "PH-DATA.ind"); - osmo_prim_init(&pp.oph, SAP_GSM_PH, PRIM_PH_DATA, - PRIM_OP_INDICATION, msg); - - /* copy over actual MAC block */ - msg->l2h = msgb_put(msg, data_ind->msgUnitParam.u8Size); - memcpy(msg->l2h, data_ind->msgUnitParam.u8Buffer, - data_ind->msgUnitParam.u8Size); - - /* LAPDm requires those... */ - pp.u.data.chan_nr = gsm_lchan2chan_nr(lchan); - pp.u.data.link_id = gen_link_id(data_ind->sapi, 0); - - /* feed into the LAPDm code of libosmogsm */ - rc = lapdm_phsap_up(&pp.oph, le); - break; - case GsmL1_Sapi_TchF: - case GsmL1_Sapi_TchH: + /* check for TCH */ + if (data_ind->sapi == GsmL1_Sapi_TchF + || data_ind->sapi == GsmL1_Sapi_TchH) { /* TCH speech frame handling */ - rc = l1if_tch_rx(lchan, l1p_msg); - break; - case GsmL1_Sapi_Pdtch: - case GsmL1_Sapi_Pacch: - /* drop incomplete UL block */ - if (!data_ind->msgUnitParam.u8Size - || data_ind->msgUnitParam.u8Buffer[0] - != GsmL1_PdtchPlType_Full) - break; - /* PDTCH / PACCH frame handling */ - rc = pcu_tx_data_ind(&trx->ts[data_ind->u8Tn], 0, - data_ind->u32Fn, data_ind->u16Arfcn, - data_ind->u8BlockNbr, - data_ind->msgUnitParam.u8Buffer + 1, - data_ind->msgUnitParam.u8Size - 1, - (int8_t) (data_ind->measParam.fRssi)); - break; - case GsmL1_Sapi_Ptcch: - /* PTCCH frame handling */ - rc = pcu_tx_data_ind(&trx->ts[data_ind->u8Tn], 1, - data_ind->u32Fn, data_ind->u16Arfcn, - data_ind->u8BlockNbr, - data_ind->msgUnitParam.u8Buffer, - data_ind->msgUnitParam.u8Size, - (int8_t) (data_ind->measParam.fRssi)); - break; - case GsmL1_Sapi_Idle: - /* nothing to send */ - break; - default: - LOGP(DL1C, LOGL_NOTICE, "Rx PH-DATA.ind for unknown L1 SAPI %s\n", - get_value_string(femtobts_l1sapi_names, data_ind->sapi)); - break; - } - - return rc; -} - -static int check_acc_delay(GsmL1_PhRaInd_t *ra_ind, struct gsm_bts_role_bts *btsb, - uint8_t *acc_delay) -{ - if (ra_ind->measParam.i16BurstTiming < 0) - *acc_delay = 0; - else - *acc_delay = ra_ind->measParam.i16BurstTiming >> 2; - return *acc_delay <= btsb->max_ta; -} - -static int handle_handover(struct gsm_lchan *lchan, struct gsm_bts_role_bts *btsb, - GsmL1_PhRaInd_t *ra_ind) -{ - uint8_t acc_delay; - if (!check_acc_delay(ra_ind, btsb, &acc_delay)) { - LOGP(DHO, LOGL_INFO, "%s ignoring RACH request %u > max_ta(%u)\n", - gsm_lchan_name(lchan), acc_delay, btsb->max_ta); - return 0; + rc = l1if_tch_rx(trx, chan_nr, l1p_msg); + msgb_free(l1p_msg); + return rc; } - handover_rach(lchan, ra_ind->msgUnitParam.u8Buffer[0], acc_delay); - return 0; + /* get data pointer and length */ + data = data_ind->msgUnitParam.u8Buffer; + len = data_ind->msgUnitParam.u8Size; + /* pull lower header part before data */ + msgb_pull(l1p_msg, data - l1p_msg->data); + /* trim remaining data to it's size, to get rid of upper header part */ + rc = msgb_trim(l1p_msg, len); + if (rc < 0) + MSGB_ABORT(l1p_msg, "No room for primitive data\n"); + l1p_msg->l2h = l1p_msg->data; + /* push new l1 header */ + l1p_msg->l1h = msgb_push(l1p_msg, sizeof(*l1sap)); + /* fill header */ + l1sap = msgb_l1sap_prim(l1p_msg); + osmo_prim_init(&l1sap->oph, SAP_GSM_PH, PRIM_PH_DATA, + PRIM_OP_INDICATION, l1p_msg); + l1sap->u.data.rssi = data_ind->measParam.fRssi; + l1sap->u.data.link_id = link_id; + l1sap->u.data.chan_nr = chan_nr; + l1sap->u.data.fn = fn; + + return l1sap_up(trx, l1sap); } -static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind) +static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind, + struct msgb *l1p_msg) { struct gsm_bts_trx *trx = fl1->priv; struct gsm_bts *bts = trx->bts; struct gsm_bts_role_bts *btsb = bts->role; struct gsm_lchan *lchan; - struct osmo_phsap_prim pp; - struct lapdm_channel *lc; - uint8_t acc_delay; + struct osmo_phsap_prim *l1sap; + uint32_t fn; + uint8_t ra, acc_delay = 0; + int rc; /* increment number of busy RACH slots, if required */ if (trx == bts->c0 && ra_ind->measParam.fRssi >= btsb->load.rach.busy_thresh) btsb->load.rach.busy++; - if (ra_ind->measParam.fLinkQuality < fl1->min_qual_rach) + if (ra_ind->measParam.fLinkQuality < fl1->min_qual_rach) { + msgb_free(l1p_msg); return 0; + } - /* - * Check if this is a handover - */ - lchan = l1if_hLayer_to_lchan(trx, ra_ind->hLayer2); - if (lchan && lchan->ho.active == HANDOVER_ENABLED) - return handle_handover(lchan, btsb, ra_ind); + if (ra_ind->measParam.i16BurstTiming > 0) + acc_delay = ra_ind->measParam.i16BurstTiming >> 2; - /* increment number of RACH slots with valid RACH burst */ - if (trx == bts->c0) + /* increment number of RACH slots with valid non-handover RACH burst */ + lchan = l1if_hLayer_to_lchan(trx, ra_ind->hLayer2); + if (trx == bts->c0 && !(lchan && lchan->ho.active == HANDOVER_ENABLED)) btsb->load.rach.access++; - DEBUGP(DL1C, "Rx PH-RA.ind"); dump_meas_res(LOGL_DEBUG, &ra_ind->measParam); - lc = get_lapdm_chan_by_hl2(fl1->priv, ra_ind->hLayer2); - if (!lc) { - LOGP(DL1C, LOGL_ERROR, "unable to resolve LAPD channel by hLayer2\n"); - return -ENODEV; - } - - /* check for under/overflow / sign */ - if (!check_acc_delay(ra_ind, btsb, &acc_delay)) { - LOGP(DL1C, LOGL_INFO, "ignoring RACH request %u > max_ta(%u)\n", - acc_delay, btsb->max_ta); + if (ra_ind->msgUnitParam.u8Size != 1) { + LOGP(DL1C, LOGL_ERROR, "PH-RACH-INDICATION has %d bits\n", + ra_ind->sapi); + msgb_free(l1p_msg); return 0; } - /* check for packet access */ - if (trx == bts->c0 - && (ra_ind->msgUnitParam.u8Buffer[0] & 0xf0) == 0x70) { - LOGP(DL1C, LOGL_INFO, "RACH for packet access\n"); - return pcu_tx_rach_ind(bts, ra_ind->measParam.i16BurstTiming, - ra_ind->msgUnitParam.u8Buffer[0], ra_ind->u32Fn); - } - - osmo_prim_init(&pp.oph, SAP_GSM_PH, PRIM_PH_RACH, - PRIM_OP_INDICATION, NULL); - - pp.u.rach_ind.ra = ra_ind->msgUnitParam.u8Buffer[0]; - pp.u.rach_ind.fn = ra_ind->u32Fn; - pp.u.rach_ind.acc_delay = acc_delay; + fn = ra_ind->u32Fn; + ra = ra_ind->msgUnitParam.u8Buffer[0]; + rc = msgb_trim(l1p_msg, sizeof(*l1sap)); + if (rc < 0) + MSGB_ABORT(l1p_msg, "No room for primitive data\n"); + l1sap = msgb_l1sap_prim(l1p_msg); + osmo_prim_init(&l1sap->oph, SAP_GSM_PH, PRIM_PH_RACH, PRIM_OP_INDICATION, + l1p_msg); + l1sap->u.rach_ind.ra = ra; + l1sap->u.rach_ind.acc_delay = acc_delay; + l1sap->u.rach_ind.fn = fn; + if (!lchan || lchan->ts->pchan == GSM_PCHAN_CCCH || + lchan->ts->pchan == GSM_PCHAN_CCCH_SDCCH4) + l1sap->u.rach_ind.chan_nr = 0x88; + else + l1sap->u.rach_ind.chan_nr = gsm_lchan2chan_nr(lchan); - return lapdm_phsap_up(&pp.oph, &lc->lapdm_dcch); + return l1sap_up(trx, l1sap); } /* handle any random indication from the L1 */ @@ -975,13 +975,12 @@ static int l1if_handle_ind(struct femtol1_hdl *fl1, struct msgb *msg) case GsmL1_PrimId_PhConnectInd: break; case GsmL1_PrimId_PhReadyToSendInd: - rc = handle_ph_readytosend_ind(fl1, &l1p->u.phReadyToSendInd); - break; + return handle_ph_readytosend_ind(fl1, &l1p->u.phReadyToSendInd, + msg); case GsmL1_PrimId_PhDataInd: - rc = handle_ph_data_ind(fl1, &l1p->u.phDataInd, msg); - break; + return handle_ph_data_ind(fl1, &l1p->u.phDataInd, msg); case GsmL1_PrimId_PhRaInd: - rc = handle_ph_ra_ind(fl1, &l1p->u.phRaInd); + return handle_ph_ra_ind(fl1, &l1p->u.phRaInd, msg); break; default: break; @@ -1437,49 +1436,6 @@ int l1if_set_trace_flags(struct femtol1_hdl *hdl, uint32_t flags) return 0; } -/* send packet data request to L1 */ -int l1if_pdch_req(struct gsm_bts_trx_ts *ts, int is_ptcch, uint32_t fn, - uint16_t arfcn, uint8_t block_nr, uint8_t *data, uint8_t len) -{ - struct gsm_bts_trx *trx = ts->trx; - struct femtol1_hdl *fl1h = trx_femtol1_hdl(trx); - 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(DL1P, "TX packet data %02u/%02u/%02u is_ptcch=%d trx=%d ts=%d " - "block_nr=%d, arfcn=%d, len=%d\n", g_time.t1, g_time.t2, - g_time.t3, is_ptcch, ts->trx->nr, ts->nr, 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 = 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->nr; - data_req->u32Fn = fn; - msu_param = &data_req->msgUnitParam; - msu_param->u8Size = len; - memcpy(msu_param->u8Buffer, data, len); - - tx_to_gsmtap(fl1h, msg); - - /* transmit */ - if (osmo_wqueue_enqueue(&fl1h->write_q[MQ_L1_WRITE], msg) != 0) { - LOGP(DL1P, LOGL_ERROR, "MQ_L1_WRITE queue full. Dropping msg.\n"); - msgb_free(msg); - } - - return 0; -} - /* get those femtol1_hdl.hw_info elements that sre in EEPROM */ static int get_hwinfo_eeprom(struct femtol1_hdl *fl1h) { @@ -1548,7 +1504,6 @@ struct femtol1_hdl *l1if_open(void *priv) fl1h->priv = priv; fl1h->clk_cal = 0; fl1h->clk_use_eeprom = 1; - fl1h->ul_power_target = -75; /* dBm default */ fl1h->min_qual_rach = MIN_QUAL_RACH; fl1h->min_qual_norm = MIN_QUAL_NORM; get_hwinfo_eeprom(fl1h); @@ -1581,10 +1536,6 @@ struct femtol1_hdl *l1if_open(void *priv) return NULL; } - fl1h->gsmtap = gsmtap_source_init("localhost", GSMTAP_UDP_PORT, 1); - if (fl1h->gsmtap) - gsmtap_source_add_sink(fl1h->gsmtap); - return fl1h; } @@ -1712,69 +1663,3 @@ int l1if_rf_clock_info_correct(struct femtol1_hdl *fl1h) } #endif - -/* - * Check if manual power control is needed - * Check if fixed power was selected - * Check if the MS is already using our level if not - * the value is bogus.. - * TODO: Add a timeout.. e.g. if the ms is not capable of reaching - * the value we have set. - */ -inline int l1if_ms_pwr_ctrl(struct gsm_lchan *lchan, const int ul_power_target, - const uint8_t ms_power, const float rxLevel) -{ - float rx; - int cur_dBm, new_dBm, new_pwr; - const enum gsm_band band = lchan->ts->trx->bts->band; - - if (!trx_ms_pwr_ctrl_is_osmo(lchan->ts->trx)) - return 0; - if (lchan->ms_power_ctrl.fixed) - return 0; - - /* The phone hasn't reached the power level yet */ - if (lchan->ms_power_ctrl.current != ms_power) - return 0; - - /* - * What is the difference between what we want and received? - * Ignore a margin that is within the range of measurement - * and MS output issues. - */ - rx = ul_power_target - rxLevel; - if (rx >= 0 && rx < 1.5f) - return 0; - if (rx < 0 && rx > -1.5f) - return 0; - - /* We don't really care about the truncation of int + float */ - cur_dBm = ms_pwr_dbm(band, ms_power); - new_dBm = cur_dBm + rx; - - /* Clamp negative values and do it depending on the band */ - if (new_dBm < 0) - new_dBm = 0; - - switch (band) { - case GSM_BAND_1800: - /* If MS_TX_PWR_MAX_CCH is set the values 29, - * 30, 31 are not used. Avoid specifying a dBm - * that would lead to these power levels. The - * phone might not be able to reach them. */ - if (new_dBm > 30) - new_dBm = 30; - break; - default: - break; - } - - new_pwr = ms_pwr_ctl_lvl(band, new_dBm); - if (lchan->ms_power_ctrl.current != new_pwr) { - lchan->ms_power_ctrl.current = new_pwr; - bts_model_adjst_ms_pwr(lchan); - return 1; - } - - return 0; -} |