From 6dc90b8c86768a9b1beb429c610dcbae6488e21c Mon Sep 17 00:00:00 2001 From: Max Date: Mon, 19 Feb 2018 17:17:28 +0100 Subject: Move PDCH-related functions into separate files The PDCH class and corresponding functions are rather self-contained and independent from BTS implementation. Let's move them into separate file to make bts.cpp more manageable. As additional benefit it allow us to somewhat untangle all the different cross-dependent includes. Change-Id: Ie05e25361e6741a81b024679f9675c98d4923683 Related: OS#1539 --- src/bts.cpp | 900 +----------------------------------------------------------- 1 file changed, 1 insertion(+), 899 deletions(-) (limited to 'src/bts.cpp') diff --git a/src/bts.cpp b/src/bts.cpp index b0d92f0d..47607df9 100644 --- a/src/bts.cpp +++ b/src/bts.cpp @@ -29,6 +29,7 @@ #include #include #include +#include extern "C" { #include @@ -825,801 +826,6 @@ GprsMs *BTS::ms_alloc(uint8_t ms_class, uint8_t egprs_ms_class) return ms; } -/* - * PDCH code below. TODO: move to a separate file - */ - -void gprs_rlcmac_pdch::enable() -{ - /* TODO: Check if there are still allocated resources.. */ - INIT_LLIST_HEAD(&paging_list); - m_is_enabled = 1; -} - -void gprs_rlcmac_pdch::disable() -{ - /* TODO.. kick free_resources once we know the TRX/TS we are on */ - m_is_enabled = 0; -} - -void gprs_rlcmac_pdch::free_resources() -{ - struct gprs_rlcmac_paging *pag; - - /* we are not enabled. there should be no resources */ - if (!is_enabled()) - return; - - /* kick all TBF on slot */ - gprs_rlcmac_tbf::free_all(this); - - /* flush all pending paging messages */ - while ((pag = dequeue_paging())) - talloc_free(pag); - - trx->bts->sba()->free_resources(this); -} - -struct gprs_rlcmac_paging *gprs_rlcmac_pdch::dequeue_paging() -{ - struct gprs_rlcmac_paging *pag; - - if (llist_empty(&paging_list)) - return NULL; - pag = llist_entry(paging_list.next, struct gprs_rlcmac_paging, list); - llist_del(&pag->list); - - return pag; -} - -struct msgb *gprs_rlcmac_pdch::packet_paging_request() -{ - struct gprs_rlcmac_paging *pag; - struct msgb *msg; - unsigned wp = 0, len; - - /* no paging, no message */ - pag = dequeue_paging(); - if (!pag) - return NULL; - - LOGP(DRLCMAC, LOGL_DEBUG, "Scheduling paging\n"); - - /* alloc message */ - msg = msgb_alloc(23, "pag ctrl block"); - if (!msg) { - talloc_free(pag); - return NULL; - } - bitvec *pag_vec = bitvec_alloc(23, tall_pcu_ctx); - if (!pag_vec) { - msgb_free(msg); - talloc_free(pag); - return NULL; - } - wp = Encoding::write_packet_paging_request(pag_vec); - - /* loop until message is full */ - while (pag) { - /* try to add paging */ - if ((pag->identity_lv[1] & 0x07) == 4) { - /* TMSI */ - LOGP(DRLCMAC, LOGL_DEBUG, "- TMSI=0x%08x\n", - ntohl(*((uint32_t *)(pag->identity_lv + 1)))); - len = 1 + 1 + 1 + 32 + 2 + 1; - if (pag->identity_lv[0] != 5) { - LOGP(DRLCMAC, LOGL_ERROR, "TMSI paging with " - "MI != 5 octets!\n"); - goto continue_next; - } - } else { - /* MI */ - LOGP(DRLCMAC, LOGL_DEBUG, "- MI=%s\n", - osmo_hexdump(pag->identity_lv + 1, - pag->identity_lv[0])); - len = 1 + 1 + 1 + 4 + (pag->identity_lv[0]<<3) + 2 + 1; - if (pag->identity_lv[0] > 8) { - LOGP(DRLCMAC, LOGL_ERROR, "Paging with " - "MI > 8 octets!\n"); - goto continue_next; - } - } - if (wp + len > 184) { - LOGP(DRLCMAC, LOGL_DEBUG, "- Does not fit, so schedule " - "next time\n"); - /* put back paging record, because does not fit */ - llist_add_tail(&pag->list, &paging_list); - break; - } - Encoding::write_repeated_page_info(pag_vec, wp, pag->identity_lv[0], - pag->identity_lv + 1, pag->chan_needed); - -continue_next: - talloc_free(pag); - pag = dequeue_paging(); - } - - bitvec_pack(pag_vec, msgb_put(msg, 23)); - RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); - LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Paging Request +++++++++++++++++++++++++\n"); - decode_gsm_rlcmac_downlink(pag_vec, mac_control_block); - LOGPC(DCSN1, LOGL_NOTICE, "\n"); - LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Paging Request -------------------------\n"); - bitvec_free(pag_vec); - talloc_free(mac_control_block); - - return msg; -} - -bool gprs_rlcmac_pdch::add_paging(uint8_t chan_needed, uint8_t *identity_lv) -{ - struct gprs_rlcmac_paging *pag = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_paging); - if (!pag) - return false; - - pag->chan_needed = chan_needed; - memcpy(pag->identity_lv, identity_lv, identity_lv[0] + 1); - - llist_add(&pag->list, &paging_list); - - return true; -} - -void gprs_rlcmac_pdch::rcv_control_ack(Packet_Control_Acknowledgement_t *packet, uint32_t fn) -{ - struct gprs_rlcmac_tbf *tbf, *new_tbf; - uint32_t tlli = packet->TLLI; - GprsMs *ms = bts()->ms_by_tlli(tlli); - gprs_rlcmac_ul_tbf *ul_tbf; - - tbf = bts()->ul_tbf_by_poll_fn(fn, trx_no(), ts_no); - if (!tbf) - tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no); - - if (!tbf) { - LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " - "unknown FN=%u TLLI=0x%08x (TRX %d TS %d)\n", - fn, tlli, trx_no(), ts_no); - if (ms) - LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " - "unknown TBF corresponds to MS with IMSI %s, TA %d, " - "uTBF (TFI=%d, state=%s), dTBF (TFI=%d, state=%s)\n", - ms->imsi(), ms->ta(), - ms->ul_tbf() ? ms->ul_tbf()->tfi() : 0, - ms->ul_tbf() ? ms->ul_tbf()->state_name() : "None", - ms->dl_tbf() ? ms->dl_tbf()->tfi() : 0, - ms->dl_tbf() ? ms->dl_tbf()->state_name() : "None"); - return; - } - - /* Reset N3101 counter: */ - tbf->m_n3101 = 0; - - tbf->update_ms(tlli, GPRS_RLCMAC_UL_TBF); - - LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Control Ack\n"); - TBF_POLL_SCHED_UNSET(tbf); - - /* check if this control ack belongs to packet uplink ack */ - ul_tbf = as_ul_tbf(tbf); - if (ul_tbf && ul_tbf->handle_ctrl_ack()) { - LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] END\n"); - if (ul_tbf->ctrl_ack_to_toggle()) - LOGPTBF(tbf, LOGL_NOTICE, "Recovered uplink ack for UL\n"); - - tbf_free(tbf); - return; - } - if (tbf->dl_ass_state_is(GPRS_RLCMAC_DL_ASS_WAIT_ACK)) { - LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] DOWNLINK ASSIGNED\n"); - /* reset N3105 */ - tbf->n3105 = 0; - TBF_SET_ASS_STATE_DL(tbf, GPRS_RLCMAC_DL_ASS_NONE); - - new_tbf = tbf->ms() ? tbf->ms()->dl_tbf() : NULL; - if (!new_tbf) { - LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but DL " - "TBF is gone TLLI=0x%08x\n", tlli); - return; - } - if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) && - tbf->direction == new_tbf->direction) - tbf_free(tbf); - - if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_CCCH)) { - /* We now know that the PACCH really existed */ - LOGPTBF(new_tbf, LOGL_INFO, - "The TBF has been confirmed on the PACCH, " - "changed type from CCCH to PACCH\n"); - TBF_ASS_TYPE_SET(new_tbf, GPRS_RLCMAC_FLAG_PACCH); - } - TBF_SET_STATE(new_tbf, GPRS_RLCMAC_FLOW); - /* stop pending assignment timer */ - new_tbf->t_stop(T0, "control acked (DL-TBF)"); - if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_TO_DL_ASS)) - LOGPTBF(new_tbf, LOGL_NOTICE, "Recovered downlink assignment\n"); - - tbf_assign_control_ts(new_tbf); - return; - } - if (tbf->ul_ass_state_is(GPRS_RLCMAC_UL_ASS_WAIT_ACK)) { - LOGPTBF(tbf, LOGL_DEBUG, "[DOWNLINK] UPLINK ASSIGNED\n"); - /* reset N3105 */ - tbf->n3105 = 0; - TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_NONE); - - new_tbf = tbf->ms() ? tbf->ms()->ul_tbf() : NULL; - if (!new_tbf) { - LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but UL " - "TBF is gone TLLI=0x%08x\n", tlli); - return; - } - if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) && - tbf->direction == new_tbf->direction) - tbf_free(tbf); - - TBF_SET_STATE(new_tbf, GPRS_RLCMAC_FLOW); - if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_TO_UL_ASS)) - LOGPTBF(new_tbf, LOGL_NOTICE, "Recovered uplink assignment for UL\n"); - - tbf_assign_control_ts(new_tbf); - /* there might be LLC packets waiting in the queue, but the DL - * TBF might have been released while the UL TBF has been - * established */ - if (new_tbf->ms()->need_dl_tbf()) - new_tbf->establish_dl_tbf_on_pacch(); - - return; - } - LOGP(DRLCMAC, LOGL_ERROR, "Error: received PACET CONTROL ACK " - "at no request\n"); -} - -static void get_rx_qual_meas(struct pcu_l1_meas *meas, uint8_t rx_qual_enc) -{ - static const int16_t rx_qual_map[] = { - 0, /* 0,14 % */ - 0, /* 0,28 % */ - 1, /* 0,57 % */ - 1, /* 1,13 % */ - 2, /* 2,26 % */ - 5, /* 4,53 % */ - 9, /* 9,05 % */ - 18, /* 18,10 % */ - }; - - meas->set_ms_rx_qual(rx_qual_map[ - OSMO_MIN(rx_qual_enc, ARRAY_SIZE(rx_qual_map)-1) - ]); -} - -static void get_meas(struct pcu_l1_meas *meas, - const Packet_Resource_Request_t *qr) -{ - unsigned i; - - meas->set_ms_c_value(qr->C_VALUE); - if (qr->Exist_SIGN_VAR) - meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */ - - for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++) - { - if (qr->Slot[i].Exist) { - LOGP(DRLCMAC, LOGL_INFO, - "Packet resource request: i_level[%d] = %d\n", - i, qr->Slot[i].I_LEVEL); - meas->set_ms_i_level(i, -2 * qr->Slot[i].I_LEVEL); - } - } -} - -static void get_meas(struct pcu_l1_meas *meas, - const Channel_Quality_Report_t *qr) -{ - unsigned i; - - get_rx_qual_meas(meas, qr->RXQUAL); - meas->set_ms_c_value(qr->C_VALUE); - meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */ - - for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++) - { - if (qr->Slot[i].Exist) { - LOGP(DRLCMAC, LOGL_DEBUG, - "Channel quality report: i_level[%d] = %d\n", - i, qr->Slot[i].I_LEVEL_TN); - meas->set_ms_i_level(i, -2 * qr->Slot[i].I_LEVEL_TN); - } - } -} - -static inline void sched_ul_ass_or_rej(BTS *bts, gprs_rlcmac_bts *bts_data, struct gprs_rlcmac_dl_tbf *tbf) -{ - bts->channel_request_description(); - - /* This call will register the new TBF with the MS on success */ - gprs_rlcmac_ul_tbf *ul_tbf = tbf_alloc_ul(bts_data, tbf->trx->trx_no, tbf->ms_class(), - tbf->ms()->egprs_ms_class(), tbf->tlli(), tbf->ta(), tbf->ms()); - - /* schedule uplink assignment or reject */ - if (ul_tbf) { - LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we provide one:\n"); - TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS); - } else { - LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we packet access reject:\n"); - TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS_REJ); - } -} - -void gprs_rlcmac_pdch::rcv_control_dl_ack_nack(Packet_Downlink_Ack_Nack_t *ack_nack, uint32_t fn) -{ - int8_t tfi = 0; /* must be signed */ - struct gprs_rlcmac_dl_tbf *tbf; - int rc; - struct pcu_l1_meas meas; - int num_blocks; - uint8_t bits_data[RLC_GPRS_WS/8]; - bitvec bits; - int bsn_begin, bsn_end; - char show_bits[RLC_GPRS_WS + 1]; - - tfi = ack_nack->DOWNLINK_TFI; - tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no); - if (!tbf) { - LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " - "unknown FN=%u TFI=%d (TRX %d TS %d)\n", - fn, tfi, trx_no(), ts_no); - return; - } - if (tbf->tfi() != tfi) { - LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " - "wrong TFI=%d, ignoring!\n", tfi); - return; - } - - /* Reset N3101 counter: */ - tbf->m_n3101 = 0; - - if (tbf->handle_ack_nack()) - LOGPTBF(tbf, LOGL_NOTICE, "Recovered downlink ack\n"); - - LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Downlink Ack/Nack\n"); - - bits.data = bits_data; - bits.data_len = sizeof(bits_data); - bits.cur_bit = 0; - - num_blocks = Decoding::decode_gprs_acknack_bits( - &ack_nack->Ack_Nack_Description, &bits, - &bsn_begin, &bsn_end, tbf->window()); - - LOGP(DRLCMAC, LOGL_DEBUG, - "Got GPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), " - "\"%s\"\n", - ack_nack->Ack_Nack_Description.STARTING_SEQUENCE_NUMBER, - bsn_begin, bsn_end, num_blocks, - (Decoding::extract_rbb(&bits, show_bits), show_bits)); - - rc = tbf->rcvd_dl_ack( - ack_nack->Ack_Nack_Description.FINAL_ACK_INDICATION, - bsn_begin, &bits); - if (rc == 1) { - tbf_free(tbf); - return; - } - /* check for channel request */ - if (ack_nack->Exist_Channel_Request_Description) - sched_ul_ass_or_rej(bts(), bts_data(), tbf); - - /* get measurements */ - if (tbf->ms()) { - get_meas(&meas, &ack_nack->Channel_Quality_Report); - tbf->ms()->update_l1_meas(&meas); - } -} - -void gprs_rlcmac_pdch::rcv_control_egprs_dl_ack_nack(EGPRS_PD_AckNack_t *ack_nack, uint32_t fn) -{ - int8_t tfi = 0; /* must be signed */ - struct gprs_rlcmac_dl_tbf *tbf; - struct pcu_l1_meas meas; - int rc; - int num_blocks; - uint8_t bits_data[RLC_EGPRS_MAX_WS/8]; - char show_bits[RLC_EGPRS_MAX_WS + 1]; - bitvec bits; - int bsn_begin, bsn_end; - - tfi = ack_nack->DOWNLINK_TFI; - tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no); - if (!tbf) { - LOGP(DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with " - "unknown FN=%u TFI=%d (TRX %d TS %d)\n", - fn, tfi, trx_no(), ts_no); - return; - } - if (tbf->tfi() != tfi) { - LOGP(DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with " - "wrong TFI=%d, ignoring!\n", tfi); - return; - } - - /* Reset N3101 counter: */ - tbf->m_n3101 = 0; - - if (tbf->handle_ack_nack()) - LOGPTBF(tbf, LOGL_NOTICE, "Recovered EGPRS downlink ack\n"); - - LOGPTBF(tbf, LOGL_DEBUG, - "RX: [PCU <- BTS] EGPRS Packet Downlink Ack/Nack\n"); - - LOGP(DRLCMAC, LOGL_DEBUG, "EGPRS ACK/NACK: " - "ut: %d, final: %d, bow: %d, eow: %d, ssn: %d, have_crbb: %d, " - "urbb_len:%d, %p, %p, %d, %d, win: %d-%d, urbb: %s\n", - (int)ack_nack->EGPRS_AckNack.UnionType, - (int)ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION, - (int)ack_nack->EGPRS_AckNack.Desc.BEGINNING_OF_WINDOW, - (int)ack_nack->EGPRS_AckNack.Desc.END_OF_WINDOW, - (int)ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER, - (int)ack_nack->EGPRS_AckNack.Desc.Exist_CRBB, - (int)ack_nack->EGPRS_AckNack.Desc.URBB_LENGTH, - (void *)&ack_nack->EGPRS_AckNack.UnionType, - (void *)&ack_nack->EGPRS_AckNack.Desc, - (int)offsetof(EGPRS_AckNack_t, Desc), - (int)offsetof(EGPRS_AckNack_w_len_t, Desc), - tbf->window()->v_a(), - tbf->window()->v_s(), - osmo_hexdump((const uint8_t *)&ack_nack->EGPRS_AckNack.Desc.URBB, - sizeof(ack_nack->EGPRS_AckNack.Desc.URBB))); - - bits.data = bits_data; - bits.data_len = sizeof(bits_data); - bits.cur_bit = 0; - - num_blocks = Decoding::decode_egprs_acknack_bits( - &ack_nack->EGPRS_AckNack.Desc, &bits, - &bsn_begin, &bsn_end, tbf->window()); - - LOGP(DRLCMAC, LOGL_DEBUG, - "Got EGPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), " - "\"%s\"\n", - ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER, - bsn_begin, bsn_end, num_blocks, - (Decoding::extract_rbb(&bits, show_bits), show_bits) - ); - - rc = tbf->rcvd_dl_ack( - ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION, - bsn_begin, &bits); - if (rc == 1) { - tbf_free(tbf); - return; - } - - /* check for channel request */ - if (ack_nack->Exist_ChannelRequestDescription) - sched_ul_ass_or_rej(bts(), bts_data(), tbf); - - /* get measurements */ - if (tbf->ms()) { - /* TODO: Implement Measurements parsing for EGPRS */ - /* - get_meas(&meas, &ack_nack->Channel_Quality_Report); - tbf->ms()->update_l1_meas(&meas); - */ - } -} - -void gprs_rlcmac_pdch::rcv_resource_request(Packet_Resource_Request_t *request, uint32_t fn) -{ - struct gprs_rlcmac_sba *sba; - - if (request->ID.UnionType) { - struct gprs_rlcmac_ul_tbf *ul_tbf = NULL; - struct gprs_rlcmac_dl_tbf *dl_tbf = NULL; - uint32_t tlli = request->ID.u.TLLI; - uint8_t ms_class = 0; - uint8_t egprs_ms_class = 0; - uint8_t ta = GSM48_TA_INVALID; - struct pcu_l1_meas meas; - - GprsMs *ms = bts()->ms_by_tlli(tlli); - /* Keep the ms, even if it gets idle temporarily */ - GprsMs::Guard guard(ms); - - if (ms) { - ul_tbf = ms->ul_tbf(); - dl_tbf = ms->dl_tbf(); - ta = ms->ta(); - } - - /* We got a RACH so the MS was in packet idle mode and thus - * didn't have any active TBFs */ - if (ul_tbf) { - LOGPTBFUL(ul_tbf, LOGL_NOTICE, - "Got RACH from TLLI=0x%08x while TBF still exists. Killing pending UL TBF\n", - tlli); - tbf_free(ul_tbf); - ul_tbf = NULL; - } - - if (dl_tbf) { - LOGPTBFUL(dl_tbf, LOGL_NOTICE, - "Got RACH from TLLI=0x%08x while TBF still exists. Release pending DL TBF\n", - tlli); - tbf_free(dl_tbf); - dl_tbf = NULL; - } - LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF " - "in packet resource request of single " - "block, so we provide one:\n"); - sba = bts()->sba()->find(this, fn); - if (!sba) { - LOGP(DRLCMAC, LOGL_NOTICE, "MS requests UL TBF " - "in packet resource request of single " - "block, but there is no resource request " - "scheduled!\n"); - } else { - ta = sba->ta; - bts()->sba()->free_sba(sba); - } - if (request->Exist_MS_Radio_Access_capability) { - ms_class = Decoding::get_ms_class_by_capability( - &request->MS_Radio_Access_capability); - egprs_ms_class = - Decoding::get_egprs_ms_class_by_capability( - &request->MS_Radio_Access_capability); - } - if (!ms_class) - LOGP(DRLCMAC, LOGL_NOTICE, "MS does not give us a class.\n"); - if (egprs_ms_class) - LOGP(DRLCMAC, LOGL_NOTICE, - "MS supports EGPRS multislot class %d.\n", - egprs_ms_class); - ul_tbf = tbf_alloc_ul(bts_data(), trx_no(), ms_class, - egprs_ms_class, tlli, ta, ms); - - if (!ul_tbf) { - handle_tbf_reject(bts_data(), ms, tlli, - trx_no(), ts_no); - return; - } - - /* set control ts to current MS's TS, until assignment complete */ - LOGPTBF(ul_tbf, LOGL_DEBUG, "change control TS %d -> %d until assinment is complete.\n", - ul_tbf->control_ts, ts_no); - - ul_tbf->control_ts = ts_no; - /* schedule uplink assignment */ - TBF_SET_ASS_STATE_UL(ul_tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS); - - /* get capabilities */ - if (ul_tbf->ms()) - ul_tbf->ms()->set_egprs_ms_class(egprs_ms_class); - - /* get measurements */ - if (ul_tbf->ms()) { - get_meas(&meas, request); - ul_tbf->ms()->update_l1_meas(&meas); - } - return; - } - - if (request->ID.u.Global_TFI.UnionType) { - struct gprs_rlcmac_dl_tbf *dl_tbf; - int8_t tfi = request->ID.u.Global_TFI.u.DOWNLINK_TFI; - dl_tbf = bts()->dl_tbf_by_tfi(tfi, trx_no(), ts_no); - if (!dl_tbf) { - LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown downlink TFI=%d\n", tfi); - return; - } - LOGPTBFDL(dl_tbf, LOGL_ERROR, - "RX: [PCU <- BTS] FIXME: Packet resource request\n"); - - /* Reset N3101 counter: */ - dl_tbf->m_n3101 = 0; - } else { - struct gprs_rlcmac_ul_tbf *ul_tbf; - int8_t tfi = request->ID.u.Global_TFI.u.UPLINK_TFI; - ul_tbf = bts()->ul_tbf_by_tfi(tfi, trx_no(), ts_no); - if (!ul_tbf) { - LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown uplink TFI=%d\n", tfi); - return; - } - LOGPTBFUL(ul_tbf, LOGL_ERROR, - "RX: [PCU <- BTS] FIXME: Packet resource request\n"); - - /* Reset N3101 counter: */ - ul_tbf->m_n3101 = 0; - } -} - -void gprs_rlcmac_pdch::rcv_measurement_report(Packet_Measurement_Report_t *report, uint32_t fn) -{ - struct gprs_rlcmac_sba *sba; - - sba = bts()->sba()->find(this, fn); - if (!sba) { - LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement " - "in packet resource request of single " - "block, but there is no resource request " - "scheduled! TLLI=0x%08x\n", report->TLLI); - } else { - GprsMs *ms = bts()->ms_store().get_ms(report->TLLI); - if (!ms) - LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement " - "but TLLI 0x%08x is unknown\n", report->TLLI); - else - ms->set_ta(sba->ta); - - bts()->sba()->free_sba(sba); - } - gprs_rlcmac_meas_rep(report); -} - -/* Received Uplink RLC control block. */ -int gprs_rlcmac_pdch::rcv_control_block( - const uint8_t *data, uint8_t data_len, bitvec *rlc_block, uint32_t fn) -{ - RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)talloc_zero(tall_pcu_ctx, RlcMacUplink_t); - LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n"); - decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); - LOGPC(DCSN1, LOGL_NOTICE, "\n"); - LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- RX : Uplink Control Block -------------------------\n"); - - if (ul_control_block->u.MESSAGE_TYPE == MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK) - bts()->send_gsmtap(PCU_GSMTAP_C_UL_DUMMY, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len); - else - bts()->send_gsmtap(PCU_GSMTAP_C_UL_CTRL, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len); - - bts()->rlc_rcvd_control(); - switch (ul_control_block->u.MESSAGE_TYPE) { - case MT_PACKET_CONTROL_ACK: - rcv_control_ack(&ul_control_block->u.Packet_Control_Acknowledgement, fn); - break; - case MT_PACKET_DOWNLINK_ACK_NACK: - rcv_control_dl_ack_nack(&ul_control_block->u.Packet_Downlink_Ack_Nack, fn); - break; - case MT_EGPRS_PACKET_DOWNLINK_ACK_NACK: - rcv_control_egprs_dl_ack_nack(&ul_control_block->u.Egprs_Packet_Downlink_Ack_Nack, fn); - break; - case MT_PACKET_RESOURCE_REQUEST: - rcv_resource_request(&ul_control_block->u.Packet_Resource_Request, fn); - break; - case MT_PACKET_MEASUREMENT_REPORT: - rcv_measurement_report(&ul_control_block->u.Packet_Measurement_Report, fn); - break; - case MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK: - /* ignoring it. change the SI to not force sending these? */ - break; - default: - bts()->decode_error(); - LOGP(DRLCMAC, LOGL_NOTICE, - "RX: [PCU <- BTS] unknown control block(%d) received\n", - ul_control_block->u.MESSAGE_TYPE); - } - talloc_free(ul_control_block); - return 1; -} - - -/* received RLC/MAC block from L1 */ -int gprs_rlcmac_pdch::rcv_block(uint8_t *data, uint8_t len, uint32_t fn, - struct pcu_l1_meas *meas) -{ - GprsCodingScheme cs = GprsCodingScheme::getBySizeUL(len); - if (!cs) { - bts()->decode_error(); - LOGP(DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid" - "length: %d)\n", len); - return -EINVAL; - } - - bts()->rlc_ul_bytes(len); - - LOGP(DRLCMACUL, LOGL_DEBUG, "Got RLC block, coding scheme: %s, " - "length: %d (%d))\n", cs.name(), len, cs.usedSizeUL()); - - if (cs.isGprs()) - return rcv_block_gprs(data, len, fn, meas, cs); - - if (cs.isEgprs()) - return rcv_data_block(data, len, fn, meas, cs); - - bts()->decode_error(); - LOGP(DRLCMACUL, LOGL_ERROR, "Unsupported coding scheme %s\n", - cs.name()); - return -EINVAL; -} - -/*! \brief process egprs and gprs data blocks */ -int gprs_rlcmac_pdch::rcv_data_block(uint8_t *data, uint8_t data_len, uint32_t fn, - struct pcu_l1_meas *meas, GprsCodingScheme cs) -{ - int rc; - struct gprs_rlc_data_info rlc_dec; - struct gprs_rlcmac_ul_tbf *tbf; - unsigned len = cs.sizeUL(); - - /* These are always data blocks, since EGPRS still uses CS-1 for - * control blocks (see 44.060, section 10.3, 1st par.) - */ - if (cs.isEgprs()) { - if (!bts()->bts_data()->egprs_enabled) { - LOGP(DRLCMACUL, LOGL_ERROR, - "Got %s RLC block but EGPRS is not enabled\n", - cs.name()); - return -EINVAL; - } - bts()->send_gsmtap(PCU_GSMTAP_C_UL_DATA_EGPRS, true, trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, data, data_len); - } else { - bts()->send_gsmtap(PCU_GSMTAP_C_UL_DATA_GPRS, true, trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, data, data_len); - } - - LOGP(DRLCMACUL, LOGL_DEBUG, " UL data: %s\n", osmo_hexdump(data, len)); - - rc = Decoding::rlc_parse_ul_data_header(&rlc_dec, data, cs); - if (rc < 0) { - LOGP(DRLCMACUL, LOGL_ERROR, - "Got %s RLC block but header parsing has failed\n", - cs.name()); - bts()->decode_error(); - return rc; - } - - LOGP(DRLCMACUL, LOGL_INFO, - "Got %s RLC block: " - "R=%d, SI=%d, TFI=%d, CPS=%d, RSB=%d, " - "rc=%d\n", - cs.name(), - rlc_dec.r, rlc_dec.si, rlc_dec.tfi, rlc_dec.cps, rlc_dec.rsb, - rc); - - /* find TBF inst from given TFI */ - tbf = ul_tbf_by_tfi(rlc_dec.tfi); - if (!tbf) { - LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TFI=%d\n", - rlc_dec.tfi); - return 0; - } - - /* Reset N3101 counter: */ - tbf->m_n3101 = 0; - - return tbf->rcv_data_block_acknowledged(&rlc_dec, data, meas); -} - -int gprs_rlcmac_pdch::rcv_block_gprs(uint8_t *data, uint8_t data_len, uint32_t fn, - struct pcu_l1_meas *meas, GprsCodingScheme cs) -{ - unsigned payload = data[0] >> 6; - bitvec *block; - int rc = 0; - unsigned len = cs.maxBytesUL(); - - switch (payload) { - case GPRS_RLCMAC_DATA_BLOCK: - rc = rcv_data_block(data, data_len, fn, meas, cs); - break; - case GPRS_RLCMAC_CONTROL_BLOCK: - block = bitvec_alloc(len, tall_pcu_ctx); - if (!block) - return -ENOMEM; - bitvec_unpack(block, data); - rc = rcv_control_block(data, data_len, block, fn); - bitvec_free(block); - break; - case GPRS_RLCMAC_CONTROL_BLOCK_OPT: - LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n"); - break; - default: - LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload); - rc = -EINVAL; - } - - return rc; -} - /* update TA based on TA provided by PH-DATA-IND */ void update_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, int8_t ta_delta) { @@ -1679,110 +885,6 @@ void bts_update_tbf_ta(const char *p, uint32_t fn, uint8_t trx_no, uint8_t ts, i } } -gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_from_list_by_tfi( - LListHead *tbf_list, uint8_t tfi, - enum gprs_rlcmac_tbf_direction dir) -{ - gprs_rlcmac_tbf *tbf; - LListHead *pos; - - llist_for_each(pos, tbf_list) { - tbf = pos->entry(); - if (tbf->tfi() != tfi) - continue; - if (!tbf->pdch[ts_no]) - continue; - return tbf; - } - return NULL; -} - -gprs_rlcmac_ul_tbf *gprs_rlcmac_pdch::ul_tbf_by_tfi(uint8_t tfi) -{ - return as_ul_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_UL_TBF)); -} - -gprs_rlcmac_dl_tbf *gprs_rlcmac_pdch::dl_tbf_by_tfi(uint8_t tfi) -{ - return as_dl_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_DL_TBF)); -} - -/* lookup TBF Entity (by TFI) */ -gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_by_tfi(uint8_t tfi, - enum gprs_rlcmac_tbf_direction dir) -{ - struct gprs_rlcmac_tbf *tbf; - - if (tfi >= 32) - return NULL; - - tbf = m_tbfs[dir][tfi]; - - if (!tbf) - return NULL; - - if (tbf->state_is_not(GPRS_RLCMAC_RELEASING)) { - return tbf; - } - - return NULL; -} - -void gprs_rlcmac_pdch::attach_tbf(gprs_rlcmac_tbf *tbf) -{ - gprs_rlcmac_ul_tbf *ul_tbf; - - if (m_tbfs[tbf->direction][tbf->tfi()]) - LOGP(DRLCMAC, LOGL_ERROR, "PDCH(TS %d, TRX %d): " - "%s has not been detached, overwriting it\n", - ts_no, trx_no(), - m_tbfs[tbf->direction][tbf->tfi()]->name()); - - m_num_tbfs[tbf->direction] += 1; - if (tbf->direction == GPRS_RLCMAC_UL_TBF) { - ul_tbf = as_ul_tbf(tbf); - m_assigned_usf |= 1 << ul_tbf->m_usf[ts_no]; - } - m_assigned_tfi[tbf->direction] |= 1UL << tbf->tfi(); - m_tbfs[tbf->direction][tbf->tfi()] = tbf; - - LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Attaching %s, %d TBFs, " - "USFs = %02x, TFIs = %08x.\n", - ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction], - m_assigned_usf, m_assigned_tfi[tbf->direction]); -} - -void gprs_rlcmac_pdch::detach_tbf(gprs_rlcmac_tbf *tbf) -{ - gprs_rlcmac_ul_tbf *ul_tbf; - - OSMO_ASSERT(m_num_tbfs[tbf->direction] > 0); - - m_num_tbfs[tbf->direction] -= 1; - if (tbf->direction == GPRS_RLCMAC_UL_TBF) { - ul_tbf = as_ul_tbf(tbf); - m_assigned_usf &= ~(1 << ul_tbf->m_usf[ts_no]); - } - m_assigned_tfi[tbf->direction] &= ~(1UL << tbf->tfi()); - m_tbfs[tbf->direction][tbf->tfi()] = NULL; - - LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Detaching %s, %d TBFs, " - "USFs = %02x, TFIs = %08x.\n", - ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction], - m_assigned_usf, m_assigned_tfi[tbf->direction]); -} - -void gprs_rlcmac_pdch::reserve(enum gprs_rlcmac_tbf_direction dir) -{ - m_num_reserved[dir] += 1; -} - -void gprs_rlcmac_pdch::unreserve(enum gprs_rlcmac_tbf_direction dir) -{ - OSMO_ASSERT(m_num_reserved[dir] > 0); - m_num_reserved[dir] -= 1; -} - void gprs_rlcmac_trx::reserve_slots(enum gprs_rlcmac_tbf_direction dir, uint8_t slots) { -- cgit v1.2.3