diff options
Diffstat (limited to 'src/pcu_l1_if.c')
| -rw-r--r-- | src/pcu_l1_if.c | 476 |
1 files changed, 476 insertions, 0 deletions
diff --git a/src/pcu_l1_if.c b/src/pcu_l1_if.c new file mode 100644 index 00000000..22f18c28 --- /dev/null +++ b/src/pcu_l1_if.c @@ -0,0 +1,476 @@ +/* pcu_l1_if.c + * + * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * 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 General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <assert.h> +#include <sys/socket.h> +#include <sys/un.h> +#include <osmocom/core/talloc.h> +#include <osmocom/core/select.h> +#include <osmocom/core/msgb.h> + +#include <gprs_rlcmac.h> +#include <pcu_l1_if.h> +#include <gprs_debug.h> +#include <gprs_bssgp_pcu.h> +#include <pcuif_proto.h> + +extern void *tall_pcu_ctx; + +// Variable for storage current FN. +int frame_number; + +int get_current_fn() +{ + return frame_number; +} + +void set_current_fn(int fn) +{ + frame_number = fn; +} + +/* + * PCU messages + */ + +struct msgb *pcu_msgb_alloc(uint8_t msg_type, uint8_t bts_nr) +{ + struct msgb *msg; + struct gsm_pcu_if *pcu_prim; + + msg = msgb_alloc(sizeof(struct gsm_pcu_if), "pcu_sock_tx"); + if (!msg) + return NULL; + msgb_put(msg, sizeof(struct gsm_pcu_if)); + pcu_prim = (struct gsm_pcu_if *) msg->data; + pcu_prim->msg_type = msg_type; + pcu_prim->bts_nr = bts_nr; + + return msg; +} + +static int pcu_tx_act_req(uint8_t trx, uint8_t ts, uint8_t activate) +{ + struct msgb *msg; + struct gsm_pcu_if *pcu_prim; + struct gsm_pcu_if_act_req *act_req; + + LOGP(DL1IF, LOGL_INFO, "Sending %s request: trx=%d ts=%d\n", + (activate) ? "activate" : "deactivate", trx, ts); + + msg = pcu_msgb_alloc(PCU_IF_MSG_ACT_REQ, 0); + if (!msg) + return -ENOMEM; + pcu_prim = (struct gsm_pcu_if *) msg->data; + act_req = &pcu_prim->u.act_req; + act_req->activate = activate; + act_req->trx_nr = trx; + act_req->ts_nr = ts; + + return pcu_sock_send(msg); +} + +static int pcu_tx_data_req(uint8_t trx, uint8_t ts, uint8_t sapi, + uint16_t arfcn, uint32_t fn, uint8_t block_nr, uint8_t *data, + uint8_t len) +{ + struct msgb *msg; + struct gsm_pcu_if *pcu_prim; + struct gsm_pcu_if_data *data_req; + + LOGP(DL1IF, LOGL_DEBUG, "Sending data request: trx=%d ts=%d sapi=%d " + "arfcn=%d fn=%d block=%d data=%s\n", trx, ts, sapi, arfcn, fn, + block_nr, osmo_hexdump(data, len)); + + msg = pcu_msgb_alloc(PCU_IF_MSG_DATA_REQ, 0); + if (!msg) + return -ENOMEM; + pcu_prim = (struct gsm_pcu_if *) msg->data; + data_req = &pcu_prim->u.data_req; + + data_req->sapi = sapi; + data_req->fn = fn; + data_req->arfcn = arfcn; + data_req->trx_nr = trx; + data_req->ts_nr = ts; + data_req->block_nr = block_nr; + memcpy(data_req->data, data, len); + data_req->len = len; + + return pcu_sock_send(msg); +} + +void pcu_l1if_tx_pdtch(struct msgb *msg, uint8_t trx, uint8_t ts, + uint16_t arfcn, uint32_t fn, uint8_t block_nr) +{ + pcu_tx_data_req(trx, ts, PCU_IF_SAPI_PDTCH, arfcn, fn, block_nr, + msg->data, msg->len); + msgb_free(msg); +} + +void pcu_l1if_tx_ptcch(struct msgb *msg, uint8_t trx, uint8_t ts, + uint16_t arfcn, uint32_t fn, uint8_t block_nr) +{ + pcu_tx_data_req(trx, ts, PCU_IF_SAPI_PTCCH, arfcn, fn, block_nr, + msg->data, msg->len); + msgb_free(msg); +} + +void pcu_l1if_tx_agch(uint8_t *data) +{ + pcu_tx_data_req(0, 0, PCU_IF_SAPI_AGCH, 0, 0, 0, data, 23); +} + +void pcu_l1if_tx_pch(uint8_t *data, char *imsi) +{ + uint8_t pch_data[3+23]; + + /* paging group */ + if (!imsi || strlen(imsi) < 3) + return; + imsi += strlen(imsi) - 3; + pch_data[0] = imsi[0]; + pch_data[1] = imsi[1]; + pch_data[2] = imsi[2]; + + memcpy(pch_data + 3, data, 23); + pcu_tx_data_req(0, 0, PCU_IF_SAPI_PCH, 0, 0, 0, pch_data, 23+3); +} + +static void pcu_l1if_tx_bcch(uint8_t *data, int len) +{ + pcu_tx_data_req(0, 0, PCU_IF_SAPI_BCCH, 0, 0, 0, data, len); +} + +static int pcu_rx_data_ind(struct gsm_pcu_if_data *data_ind) +{ + int rc = 0; + + LOGP(DL1IF, LOGL_DEBUG, "Data indication received: sapi=%d arfcn=%d " + "block=%d data=%s\n", data_ind->sapi, + data_ind->arfcn, data_ind->block_nr, + osmo_hexdump(data_ind->data, data_ind->len)); + + switch (data_ind->sapi) { + case PCU_IF_SAPI_PDTCH: + rc = gprs_rlcmac_rcv_block(data_ind->trx_nr, data_ind->ts_nr, + data_ind->data, data_ind->len, data_ind->fn); + break; + default: + LOGP(DL1IF, LOGL_ERROR, "Received PCU data indication with " + "unsupported sapi %d\n", data_ind->sapi); + rc = -EINVAL; + } + + return rc; +} + +static int pcu_rx_rts_req(struct gsm_pcu_if_rts_req *rts_req) +{ + int rc = 0; + + LOGP(DL1IF, LOGL_DEBUG, "RTS request received: trx=%d ts=%d sapi=%d " + "arfcn=%d fn=%d block=%d\n", rts_req->trx_nr, rts_req->ts_nr, + rts_req->sapi, rts_req->arfcn, rts_req->fn, rts_req->block_nr); + + switch (rts_req->sapi) { + case PCU_IF_SAPI_PDTCH: + gprs_rlcmac_rcv_rts_block(rts_req->trx_nr, rts_req->ts_nr, + rts_req->arfcn, rts_req->fn, rts_req->block_nr); + break; + case PCU_IF_SAPI_PTCCH: + /* FIXME */ + { + struct msgb *msg = msgb_alloc(23, "l1_prim"); + memset(msgb_put(msg, 23), 0x2b, 23); + pcu_l1if_tx_ptcch(msg, rts_req->trx_nr, rts_req->ts_nr, + rts_req->arfcn, rts_req->fn, rts_req->block_nr); + } + break; + default: + LOGP(DL1IF, LOGL_ERROR, "Received PCU RTS request with " + "unsupported sapi %d\n", rts_req->sapi); + rc = -EINVAL; + } + + return rc; +} + +static int pcu_rx_rach_ind(struct gsm_pcu_if_rach_ind *rach_ind) +{ + int rc = 0; + + LOGP(DL1IF, LOGL_INFO, "RACH request received: sapi=%d " + "qta=%d, ra=%d, fn=%d\n", rach_ind->sapi, rach_ind->qta, + rach_ind->ra, rach_ind->fn); + + switch (rach_ind->sapi) { + case PCU_IF_SAPI_RACH: + rc = gprs_rlcmac_rcv_rach(rach_ind->ra, rach_ind->fn, + rach_ind->qta); + break; + default: + LOGP(DL1IF, LOGL_ERROR, "Received PCU rach request with " + "unsupported sapi %d\n", rach_ind->sapi); + rc = -EINVAL; + } + + return rc; +} + +int flush_pdch(struct gprs_rlcmac_pdch *pdch) +{ + uint8_t tfi; + struct gprs_rlcmac_tbf *tbf; + struct gprs_rlcmac_paging *pag; + + /* kick all TBF on slot */ + for (tfi = 0; tfi < 32; tfi++) { + tbf = pdch->ul_tbf[tfi]; + if (tbf) + tbf_free(tbf); + tbf = pdch->dl_tbf[tfi]; + if (tbf) + tbf_free(tbf); + } + /* flush all pending paging messages */ + while ((pag = gprs_rlcmac_dequeue_paging(pdch))) + talloc_free(pag); + + return 0; +} + +static int pcu_rx_info_ind(struct gsm_pcu_if_info_ind *info_ind) +{ + struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; + struct gprs_rlcmac_pdch *pdch; + int rc = 0; + int trx, ts; + int i; + + if (info_ind->version != PCU_IF_VERSION) { + fprintf(stderr, "PCU interface version number of BTS (%d) is " + "different (%d).\nPlease re-compile!\n", + info_ind->version, PCU_IF_VERSION); + exit(-1); + } + + LOGP(DL1IF, LOGL_DEBUG, "Info indication received:\n"); + + if (!(info_ind->flags & PCU_IF_FLAG_ACTIVE)) { + LOGP(DL1IF, LOGL_NOTICE, "BTS not available\n"); +bssgp_failed: + /* free all TBF */ + for (trx = 0; trx < 8; trx++) { + bts->trx[trx].arfcn = info_ind->trx[trx].arfcn; + for (ts = 0; ts < 8; ts++) { + if (bts->trx[trx].pdch[ts].enable) + flush_pdch(&bts->trx[trx].pdch[ts]); + } + } + gprs_bssgp_destroy(); + return 0; + } + LOGP(DL1IF, LOGL_INFO, "BTS available\n"); + LOGP(DL1IF, LOGL_DEBUG, " mcc=%d\n", info_ind->mcc); + LOGP(DL1IF, LOGL_DEBUG, " mnc=%d\n", info_ind->mnc); + LOGP(DL1IF, LOGL_DEBUG, " lac=%d\n", info_ind->lac); + LOGP(DL1IF, LOGL_DEBUG, " rac=%d\n", info_ind->rac); + LOGP(DL1IF, LOGL_DEBUG, " cell_id=%d\n", info_ind->cell_id); + LOGP(DL1IF, LOGL_DEBUG, " nsei=%d\n", info_ind->nsei); + LOGP(DL1IF, LOGL_DEBUG, " nse_timer=%d %d %d %d %d %d %d\n", + info_ind->nse_timer[0], info_ind->nse_timer[1], + info_ind->nse_timer[2], info_ind->nse_timer[3], + info_ind->nse_timer[4], info_ind->nse_timer[5], + info_ind->nse_timer[6]); + LOGP(DL1IF, LOGL_DEBUG, " cell_timer=%d %d %d %d %d %d %d %d %d %d " + "%d\n", + info_ind->cell_timer[0], info_ind->cell_timer[1], + info_ind->cell_timer[2], info_ind->cell_timer[3], + info_ind->cell_timer[4], info_ind->cell_timer[5], + info_ind->cell_timer[6], info_ind->cell_timer[7], + info_ind->cell_timer[8], info_ind->cell_timer[9], + info_ind->cell_timer[10]); + LOGP(DL1IF, LOGL_DEBUG, " repeat_time=%d\n", info_ind->repeat_time); + LOGP(DL1IF, LOGL_DEBUG, " repeat_count=%d\n", info_ind->repeat_count); + LOGP(DL1IF, LOGL_DEBUG, " bvci=%d\n", info_ind->bvci); + LOGP(DL1IF, LOGL_DEBUG, " t3142=%d\n", info_ind->t3142); + LOGP(DL1IF, LOGL_DEBUG, " t3169=%d\n", info_ind->t3169); + LOGP(DL1IF, LOGL_DEBUG, " t3191=%d\n", info_ind->t3191); + LOGP(DL1IF, LOGL_DEBUG, " t3193=%d (ms)\n", info_ind->t3193_10ms * 10); + LOGP(DL1IF, LOGL_DEBUG, " t3195=%d\n", info_ind->t3195); + LOGP(DL1IF, LOGL_DEBUG, " n3101=%d\n", info_ind->n3101); + LOGP(DL1IF, LOGL_DEBUG, " n3103=%d\n", info_ind->n3103); + LOGP(DL1IF, LOGL_DEBUG, " n3105=%d\n", info_ind->n3105); + LOGP(DL1IF, LOGL_DEBUG, " cv_countdown=%d\n", info_ind->cv_countdown); + LOGP(DL1IF, LOGL_DEBUG, " dl_tbf_ext=%d\n", info_ind->dl_tbf_ext); + LOGP(DL1IF, LOGL_DEBUG, " ul_tbf_ext=%d\n", info_ind->ul_tbf_ext); + for (i = 0; i < 4; i++) { + if ((info_ind->flags & (PCU_IF_FLAG_CS1 << i))) + LOGP(DL1IF, LOGL_DEBUG, " Use CS%d\n", i+1); + } + for (i = 0; i < 9; i++) { + if ((info_ind->flags & (PCU_IF_FLAG_MCS1 << i))) + LOGP(DL1IF, LOGL_DEBUG, " Use MCS%d\n", i+1); + } + LOGP(DL1IF, LOGL_DEBUG, " initial_cs=%d\n", info_ind->initial_cs); + LOGP(DL1IF, LOGL_DEBUG, " initial_mcs=%d\n", info_ind->initial_mcs); + LOGP(DL1IF, LOGL_DEBUG, " nsvci=%d\n", info_ind->nsvci[0]); + LOGP(DL1IF, LOGL_DEBUG, " local_port=%d\n", info_ind->local_port[0]); + LOGP(DL1IF, LOGL_DEBUG, " remote_port=%d\n", info_ind->remote_port[0]); + LOGP(DL1IF, LOGL_DEBUG, " remote_ip=%d\n", info_ind->remote_ip[0]); + + rc = gprs_bssgp_create(info_ind->remote_ip[0], info_ind->remote_port[0], + info_ind->nsei, info_ind->nsvci[0], info_ind->bvci, + info_ind->mcc, info_ind->mnc, info_ind->lac, info_ind->rac, + info_ind->cell_id); + if (rc < 0) { + LOGP(DL1IF, LOGL_NOTICE, "SGSN not available\n"); + goto bssgp_failed; + } + + bts->cs1 = !!(info_ind->flags & PCU_IF_FLAG_CS1); + bts->cs2 = !!(info_ind->flags & PCU_IF_FLAG_CS2); + bts->cs3 = !!(info_ind->flags & PCU_IF_FLAG_CS3); + bts->cs4 = !!(info_ind->flags & PCU_IF_FLAG_CS4); + if (!bts->cs1 && !bts->cs2 && !bts->cs3 && !bts->cs4) + bts->cs1 = 1; + if (info_ind->t3142) { /* if timer values are set */ + bts->t3142 = info_ind->t3142; + bts->t3169 = info_ind->t3169; + bts->t3191 = info_ind->t3191; + bts->t3193_msec = info_ind->t3193_10ms * 10; + bts->t3195 = info_ind->t3195; + bts->n3101 = info_ind->n3101; + bts->n3103 = info_ind->n3103; + bts->n3105 = info_ind->n3105; + } + if (!bts->force_cs) { + if (info_ind->initial_cs < 1 || info_ind->initial_cs > 4) + bts->initial_cs = 1; + else + bts->initial_cs = info_ind->initial_cs; + } + + for (trx = 0; trx < 8; trx++) { + bts->trx[trx].arfcn = info_ind->trx[trx].arfcn; + for (ts = 0; ts < 8; ts++) { + pdch = &bts->trx[trx].pdch[ts]; + if ((info_ind->trx[trx].pdch_mask & (1 << ts))) { + /* FIXME: activate dynamically at RLCMAC */ + if (!pdch->enable) { + pcu_tx_act_req(trx, ts, 1); + INIT_LLIST_HEAD(&pdch->paging_list); + pdch->enable = 1; + } + pdch->tsc = info_ind->trx[trx].tsc[ts]; + LOGP(DL1IF, LOGL_INFO, "PDCH: trx=%d ts=%d\n", + trx, ts); + } else { + if (pdch->enable) { + pcu_tx_act_req(trx, ts, 0); + pdch->enable = 0; + flush_pdch(pdch); + } + } + } + } + + return rc; +} + +static int pcu_rx_time_ind(struct gsm_pcu_if_time_ind *time_ind) +{ + struct gprs_rlcmac_tbf *tbf; + uint32_t elapsed; + uint8_t fn13 = time_ind->fn % 13; + + /* omit frame numbers not starting at a MAC block */ + if (fn13 != 0 && fn13 != 4 && fn13 != 8) + return 0; + + LOGP(DL1IF, LOGL_DEBUG, "Time indication received: %d\n", + time_ind->fn % 52); + + set_current_fn(time_ind->fn); + + /* check for poll timeout */ + llist_for_each_entry(tbf, &gprs_rlcmac_ul_tbfs, list) { + if (tbf->poll_state == GPRS_RLCMAC_POLL_SCHED) { + elapsed = (frame_number - tbf->poll_fn) % 2715648; + if (elapsed >= 20 && elapsed < 200) + gprs_rlcmac_poll_timeout(tbf); + } + } + llist_for_each_entry(tbf, &gprs_rlcmac_dl_tbfs, list) { + if (tbf->poll_state == GPRS_RLCMAC_POLL_SCHED) { + elapsed = (frame_number - tbf->poll_fn) % 2715648; + if (elapsed >= 20 && elapsed < 200) + gprs_rlcmac_poll_timeout(tbf); + } + } + + return 0; +} + +static int pcu_rx_pag_req(struct gsm_pcu_if_pag_req *pag_req) +{ + LOGP(DL1IF, LOGL_DEBUG, "Paging request received: chan_needed=%d " + "length=%d\n", pag_req->chan_needed, pag_req->identity_lv[0]); + + return gprs_rlcmac_add_paging(pag_req->chan_needed, + pag_req->identity_lv); +} + +int pcu_rx(uint8_t msg_type, struct gsm_pcu_if *pcu_prim) +{ + int rc = 0; + + switch (msg_type) { + case PCU_IF_MSG_DATA_IND: + rc = pcu_rx_data_ind(&pcu_prim->u.data_ind); + break; + case PCU_IF_MSG_RTS_REQ: + rc = pcu_rx_rts_req(&pcu_prim->u.rts_req); + break; + case PCU_IF_MSG_RACH_IND: + rc = pcu_rx_rach_ind(&pcu_prim->u.rach_ind); + break; + case PCU_IF_MSG_INFO_IND: + rc = pcu_rx_info_ind(&pcu_prim->u.info_ind); + break; + case PCU_IF_MSG_TIME_IND: + rc = pcu_rx_time_ind(&pcu_prim->u.time_ind); + break; + case PCU_IF_MSG_PAG_REQ: + rc = pcu_rx_pag_req(&pcu_prim->u.pag_req); + break; + default: + LOGP(DL1IF, LOGL_ERROR, "Received unknwon PCU msg type %d\n", + msg_type); + rc = -EINVAL; + } + + return rc; +} |