/* Copied from tbf.cpp * * Copyright (C) 2012 Ivan Klyuchnikov * Copyright (C) 2012 Andreas Eversberg * Copyright (C) 2013 by Holger Hans Peter Freyther * * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pcu_utils.h" #include "alloc_algo.h" extern "C" { #include #include #include #include #include #include #include #include #include #include #include #include #include "coding_scheme.h" } #include #include /* After sending these frames, we poll for ack/nack. */ #define POLL_ACK_AFTER_FRAMES 20 extern void *tall_pcu_ctx; static const struct rate_ctr_desc tbf_dl_gprs_ctr_description[] = { { "gprs:downlink:cs1", "CS1 " }, { "gprs:downlink:cs2", "CS2 " }, { "gprs:downlink:cs3", "CS3 " }, { "gprs:downlink:cs4", "CS4 " }, }; static const struct rate_ctr_desc tbf_dl_egprs_ctr_description[] = { { "egprs:downlink:mcs1", "MCS1 " }, { "egprs:downlink:mcs2", "MCS2 " }, { "egprs:downlink:mcs3", "MCS3 " }, { "egprs:downlink:mcs4", "MCS4 " }, { "egprs:downlink:mcs5", "MCS5 " }, { "egprs:downlink:mcs6", "MCS6 " }, { "egprs:downlink:mcs7", "MCS7 " }, { "egprs:downlink:mcs8", "MCS8 " }, { "egprs:downlink:mcs9", "MCS9 " }, }; static const struct rate_ctr_group_desc tbf_dl_gprs_ctrg_desc = { "tbf:gprs", "Data Blocks", OSMO_STATS_CLASS_SUBSCRIBER, ARRAY_SIZE(tbf_dl_gprs_ctr_description), tbf_dl_gprs_ctr_description, }; static const struct rate_ctr_group_desc tbf_dl_egprs_ctrg_desc = { "tbf:egprs", "Data Blocks", OSMO_STATS_CLASS_SUBSCRIBER, ARRAY_SIZE(tbf_dl_egprs_ctr_description), tbf_dl_egprs_ctr_description, }; gprs_rlcmac_dl_tbf::BandWidth::BandWidth() : dl_bw_octets(0), dl_throughput(0), dl_loss_lost(0), dl_loss_received(0) { osmo_clock_gettime(CLOCK_MONOTONIC, &dl_bw_tv); osmo_clock_gettime(CLOCK_MONOTONIC, &dl_loss_tv); } static int dl_tbf_dtor(struct gprs_rlcmac_dl_tbf *tbf) { tbf->~gprs_rlcmac_dl_tbf(); return 0; } struct gprs_rlcmac_dl_tbf *dl_tbf_alloc(struct gprs_rlcmac_bts *bts, struct GprsMs *ms) { struct gprs_rlcmac_dl_tbf *tbf; OSMO_ASSERT(ms != NULL); LOGPMS(ms, DTBF, LOGL_DEBUG, "********** DL-TBF starts here **********\n"); LOGPMS(ms, DTBF, LOGL_INFO, "Allocating DL TBF\n"); tbf = talloc(tall_pcu_ctx, struct gprs_rlcmac_dl_tbf); if (!tbf) return NULL; talloc_set_destructor(tbf, dl_tbf_dtor); new (tbf) gprs_rlcmac_dl_tbf(bts, ms); if (tbf->is_egprs_enabled()) { tbf->m_dl_egprs_ctrs = rate_ctr_group_alloc(tbf, &tbf_dl_egprs_ctrg_desc, tbf->m_ctrs->idx); if (!tbf->m_dl_egprs_ctrs) { LOGPTBF(tbf, LOGL_ERROR, "Couldn't allocate EGPRS DL counters\n"); talloc_free(tbf); return NULL; } } else { tbf->m_dl_gprs_ctrs = rate_ctr_group_alloc(tbf, &tbf_dl_gprs_ctrg_desc, tbf->m_ctrs->idx); if (!tbf->m_dl_gprs_ctrs) { LOGPTBF(tbf, LOGL_ERROR, "Couldn't allocate GPRS DL counters\n"); talloc_free(tbf); return NULL; } } bts_do_rate_ctr_inc(tbf->bts, CTR_TBF_DL_ALLOCATED); return tbf; } gprs_rlcmac_dl_tbf::~gprs_rlcmac_dl_tbf() { if (is_egprs_enabled()) { rate_ctr_group_free(m_dl_egprs_ctrs); } else { rate_ctr_group_free(m_dl_gprs_ctrs); } /* ~gprs_rlcmac_tbf() is called automatically upon return */ } gprs_rlcmac_dl_tbf::gprs_rlcmac_dl_tbf(struct gprs_rlcmac_bts *bts_, GprsMs *ms) : gprs_rlcmac_tbf(bts_, ms, GPRS_RLCMAC_DL_TBF), m_tx_counter(0), m_dl_ack_requested(false), m_last_dl_poll_fn(-1), m_last_dl_poll_ack_lost(false), m_last_dl_drained_fn(-1), m_first_dl_ack_rcvd(false), m_dl_gprs_ctrs(NULL), m_dl_egprs_ctrs(NULL) { memset(&state_fsm, 0, sizeof(state_fsm)); state_fsm.dl_tbf = this; state_fi = osmo_fsm_inst_alloc(&tbf_dl_fsm, this, &state_fsm, LOGL_INFO, NULL); OSMO_ASSERT(state_fi); INIT_LLIST_HEAD(&this->tx_llc_until_first_dl_ack_rcvd); /* This has to be called in child constructor because enable_egprs() * uses the window() virtual function which is dependent on subclass. */ if (ms_mode(m_ms) != GPRS) enable_egprs(); } /** * TODO: split into unit test-able parts... */ int dl_tbf_handle(struct gprs_rlcmac_bts *bts, const uint32_t tlli, const uint32_t tlli_old, const char *imsi, uint8_t ms_class, uint8_t egprs_ms_class, const uint16_t delay_csec, const uint8_t *data, const uint16_t len) { int rc; GprsMs *ms, *ms_old; bool ms_allocated = false; /* check for existing TBF */ ms = bts_get_ms(bts, tlli, tlli_old, imsi); /* If we got MS by TLLI above let's see if we already have another MS * object identified by IMSI and merge them */ if (ms) { if (!ms_imsi_is_valid(ms) && imsi) { ms_old = bts_get_ms_by_imsi(bts, imsi); if (ms_old && ms_old != ms) { /* The TLLI has changed (RAU), so there are two MS * objects for the same MS */ LOGP(DTBF, LOGL_NOTICE, "There is a new MS object for the same MS: (0x%08x, '%s') -> (0x%08x, '%s')\n", ms_tlli(ms_old), ms_imsi(ms_old), ms_tlli(ms), ms_imsi(ms)); ms_merge_and_clear_ms(ms, ms_old); /* old_ms may no longer be available here */ } } } else { ms = ms_alloc(bts, __func__); /* Remember we have to unref the alloc reference at the end: */ ms_allocated = true; } if (imsi) ms_set_imsi(ms, imsi); ms_confirm_tlli(ms, tlli); if (!ms_ms_class(ms) && ms_class) { ms_set_ms_class(ms, ms_class); } if (!ms_egprs_ms_class(ms) && egprs_ms_class) { ms_set_egprs_ms_class(ms, egprs_ms_class); } rc = ms_append_llc_dl_data(ms, delay_csec, data, len); if (ms_allocated) { ms_unref(ms, __func__); /* Here "ms" may be freed if ms_append_llc_dl_data() failed to * allocate a DL TBF and it has no more TBFs attached */ } return rc; } bool gprs_rlcmac_dl_tbf::restart_bsn_cycle() { /* If V(S) == V(A) and finished state, we would have received * acknowledgement of all transmitted block. In this case we would * have transmitted the final block, and received ack from MS. But in * this case we did not receive the final ack indication from MS. This * should never happen if MS works correctly. */ if (m_window.window_empty()) { LOGPTBFDL(this, LOGL_DEBUG, "MS acked all blocks\n"); return false; } /* cycle through all unacked blocks */ int resend = m_window.mark_for_resend(); /* At this point there should be at least one unacked block * to be resent. If not, this is an software error. */ if (resend == 0) { LOGPTBFDL(this, LOGL_ERROR, "FIXME: Software error: There are no unacknowledged blocks, but V(A) != V(S). PLEASE FIX!\n"); return false; } return true; } int gprs_rlcmac_dl_tbf::take_next_bsn(uint32_t fn, int previous_bsn, enum mcs_kind req_mcs_kind, bool *may_combine) { int bsn; int data_len2, force_data_len = -1; enum CodingScheme tx_cs; /* Scheduler may be fine with sending any kind of data, but if the selected TBF is GPRS-only, then let's filter out EGPRS here */ if (!is_egprs_enabled()) req_mcs_kind = GPRS; /* search for a nacked or resend marked bsn */ bsn = m_window.resend_needed(); if (previous_bsn >= 0) { tx_cs = m_rlc.block(previous_bsn)->cs_current_trans; if (!mcs_is_edge(tx_cs)) return -1; force_data_len = m_rlc.block(previous_bsn)->len; } else { tx_cs = ms_current_cs_dl(ms(), req_mcs_kind); } if (bsn >= 0) { /* resend an unacked bsn or resend bsn. */ if (previous_bsn == bsn) return -1; if (previous_bsn >= 0 && m_window.mod_sns(bsn - previous_bsn) > RLC_EGPRS_MAX_BSN_DELTA) return -1; if (is_egprs_enabled()) { /* Table 8.1.1.2 and Table 8.1.1.1 of 44.060 */ m_rlc.block(bsn)->cs_current_trans = get_retx_mcs(m_rlc.block(bsn)->cs_init, tx_cs, bts->pcu->vty.dl_arq_type == EGPRS_ARQ1); LOGPTBFDL(this, LOGL_DEBUG, "initial_cs_dl(%s) last_mcs(%s) demanded_mcs(%s) cs_trans(%s) arq_type(%d) bsn(%d)\n", mcs_name(m_rlc.block(bsn)->cs_init), mcs_name(m_rlc.block(bsn)->cs_last), mcs_name(tx_cs), mcs_name(m_rlc.block(bsn)->cs_current_trans), the_pcu->vty.dl_arq_type, bsn); /* TODO: Need to remove this check when MCS-8 -> MCS-6 * transistion is handled. * Refer commit be881c028fc4da00c4046ecd9296727975c206a3 */ if (m_rlc.block(bsn)->cs_init == MCS8) m_rlc.block(bsn)->cs_current_trans = MCS8; } else { /* gprs */ m_rlc.block(bsn)->cs_current_trans = m_rlc.block(bsn)->cs_last; } data_len2 = m_rlc.block(bsn)->len; if (force_data_len > 0 && force_data_len != data_len2) return -1; LOGPTBFDL(this, LOGL_DEBUG, "Resending BSN %d\n", bsn); /* re-send block with negative aknowlegement */ m_window.m_v_b.mark_unacked(bsn); bts_do_rate_ctr_inc(bts, CTR_RLC_RESENT); } else if (state_is(TBF_ST_FINISHED)) { /* If the TBF is in finished, we already sent all packages at least once. * If any packages could have been sent (because of unacked) it should have * been catched up by the upper if(bsn >= 0) */ LOGPTBFDL(this, LOGL_DEBUG, "Restarting at BSN %d, because all blocks have been transmitted.\n", m_window.v_a()); bts_do_rate_ctr_inc(bts, CTR_RLC_RESTARTED); if (restart_bsn_cycle()) return take_next_bsn(fn, previous_bsn, req_mcs_kind, may_combine); } else if (dl_window_stalled()) { /* There are no more packages to send, but the window is stalled. * Restart the bsn_cycle to resend all unacked messages */ LOGPTBFDL(this, LOGL_NOTICE, "Restarting at BSN %d, because the window is stalled.\n", m_window.v_a()); bts_do_rate_ctr_inc(bts, CTR_RLC_STALLED); if (restart_bsn_cycle()) return take_next_bsn(fn, previous_bsn, req_mcs_kind, may_combine); } else if (have_data()) { /* The window has space left, generate new bsn */ LOGPTBFDL(this, LOGL_DEBUG, "Sending new block at BSN %d, CS=%s%s\n", m_window.v_s(), mcs_name(tx_cs), force_data_len != -1 ? " (forced)" : ""); bsn = create_new_bsn(fn, tx_cs); } else if (bts->pcu->vty.dl_tbf_preemptive_retransmission && !m_window.window_empty()) { /* The window contains unacked packages, but not acked. * Mark unacked bsns as RESEND */ LOGPTBFDL(this, LOGL_DEBUG, "Restarting at BSN %d, because all blocks have been transmitted (FLOW).\n", m_window.v_a()); bts_do_rate_ctr_inc(bts, CTR_RLC_RESTARTED); if (restart_bsn_cycle()) return take_next_bsn(fn, previous_bsn, req_mcs_kind, may_combine); } else { /* Nothing left to send, create dummy LLC commands */ LOGPTBFDL(this, LOGL_DEBUG, "Sending new dummy block at BSN %d, CS=%s\n", m_window.v_s(), mcs_name(tx_cs)); bsn = create_new_bsn(fn, tx_cs); /* Don't send a second block, so don't set cs_current_trans */ } if (bsn < 0) { /* we just send final block again */ LOGPTBFDL(this, LOGL_DEBUG, "Nothing else to send, Re-transmit final block!\n"); bsn = m_window.v_s_mod(-1); bts_do_rate_ctr_inc(bts, CTR_RLC_FINAL_BLOCK_RESENT); bts_do_rate_ctr_inc(bts, CTR_RLC_RESENT); } *may_combine = num_data_blocks(mcs_header_type(m_rlc.block(bsn)->cs_current_trans)) > 1; return bsn; } /* * Create DL data block * The messages are fragmented and forwarded as data blocks. */ struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block(uint32_t fn, const struct gprs_rlcmac_pdch *pdch, enum mcs_kind req_mcs_kind) { int bsn, bsn2 = -1; bool may_combine; LOGPTBFDL(this, LOGL_DEBUG, "downlink (V(A)==%d .. V(S)==%d) mcs_mode_restrict=%s\n", m_window.v_a(), m_window.v_s(), mode_name(req_mcs_kind)); bsn = take_next_bsn(fn, -1, req_mcs_kind, &may_combine); if (bsn < 0) return NULL; if (may_combine) bsn2 = take_next_bsn(fn, bsn, req_mcs_kind, &may_combine); return create_dl_acked_block(fn, pdch, bsn, bsn2); } void gprs_rlcmac_dl_tbf::apply_allocated_resources(const struct alloc_resources_res *res) { uint8_t ts; if (this->trx) llist_del(&this->m_trx_list.list); llist_add(&this->m_trx_list.list, &res->trx->dl_tbfs); this->trx = res->trx; this->upgrade_to_multislot = res->upgrade_to_multislot; for (ts = 0; ts < ARRAY_SIZE(trx->pdch); ts++) { struct gprs_rlcmac_pdch *pdch = &trx->pdch[ts]; OSMO_ASSERT(!this->pdch[pdch->ts_no]); if (!(res->ass_slots_mask & (1 << ts))) continue; LOGPTBFDL(this, LOGL_DEBUG, "Assigning TS=%u TFI=%d\n", ts, res->tfi); this->m_tfi = res->tfi; this->pdch[pdch->ts_no] = pdch; pdch->attach_tbf(this); } /* assign initial control ts */ tbf_assign_control_ts(this); LOGPTBF(this, LOGL_INFO, "Allocated: trx = %d, ul_slots = %02x, dl_slots = %02x\n", this->trx->trx_no, ul_slots(), dl_slots()); if (tbf_is_egprs_enabled(this)) this->set_window_size(); tbf_update_state_fsm_name(this); } void dl_tbf_apply_allocated_resources(struct gprs_rlcmac_dl_tbf *dl_tbf, const struct alloc_resources_res *res) { dl_tbf->apply_allocated_resources(res); } /* old_tbf (UL TBF or DL TBF) will send a Pkt Dl Ass on PACCH to assign tbf. * Note: It is possible that "tbf == old_tbf" if the TBF is being updated. This can * happen when we first assign over PCH (only single slot is possible) and we want * to upgrade the DL-TBF to be multislot. See code calling tbf_update() for more * information. */ void dl_tbf_trigger_ass_on_pacch(struct gprs_rlcmac_dl_tbf *tbf, struct gprs_rlcmac_tbf *old_tbf) { OSMO_ASSERT(tbf); OSMO_ASSERT(old_tbf); /* stop pending timer */ tbf_stop_timers(tbf, "DL assignment (PACCH)"); LOGPTBFDL(tbf, LOGL_DEBUG, "Send downlink assignment on PACCH, because %s exists\n", old_tbf->name()); osmo_fsm_inst_dispatch(old_tbf->dl_ass_fsm.fi, TBF_DL_ASS_EV_SCHED_ASS, NULL); /* change state */ osmo_fsm_inst_dispatch(tbf->state_fi, TBF_EV_ASSIGN_ADD_PACCH, NULL); } void dl_tbf_trigger_ass_on_pch(struct gprs_rlcmac_dl_tbf *tbf) { /* stop pending timer */ struct GprsMs *ms = tbf_ms(tbf); tbf_stop_timers(tbf, "DL assignment (PCH)"); LOGPTBFDL(tbf, LOGL_DEBUG, "Send downlink assignment on PCH, no TBF exist (IMSI=%s)\n", ms_imsi(ms)); /* change state */ osmo_fsm_inst_dispatch(tbf->state_fi, TBF_EV_ASSIGN_ADD_CCCH, NULL); } int dl_tbf_upgrade_to_multislot(struct gprs_rlcmac_dl_tbf *dl_tbf) { int rc; struct gprs_rlcmac_tbf *tbf = dl_tbf_as_tbf(dl_tbf); struct gprs_rlcmac_trx *trx = tbf_get_trx(dl_tbf); struct gprs_rlcmac_bts *bts = trx->bts; struct GprsMs *ms = tbf->ms(); LOGPTBFDL(dl_tbf, LOGL_DEBUG, "Upgrade to multislot\n"); tbf_unlink_pdch(dl_tbf); const struct alloc_resources_req req = { .bts = bts, .ms = ms, .direction = tbf_direction(tbf), .single = false, .use_trx = -1, }; struct alloc_resources_res res = {}; rc = the_pcu->alloc_algorithm(&req, &res); /* if no resource */ if (rc < 0) { LOGPTBFDL(dl_tbf, LOGL_ERROR, "No resources allocated during upgrade to multislot!\n"); bts_do_rate_ctr_inc(bts, CTR_TBF_ALLOC_FAIL); return rc; } /* Update MS, really allocate the resources */ if (res.reserved_ul_slots != ms_reserved_ul_slots(ms) || res.reserved_dl_slots != ms_reserved_dl_slots(ms)) { /* The reserved slots have changed, update the MS */ ms_set_reserved_slots(ms, res.trx, res.reserved_ul_slots, res.reserved_dl_slots); } ms_set_first_common_ts(ms, res.first_common_ts); /* Apply allocated resources to TBF: */ dl_tbf_apply_allocated_resources(dl_tbf, &res); /* Note: No need to call ms_attach_tbf(), tbf is already attached to the MS */ /* Now trigger the assignment using the pre-existing TBF: */ dl_tbf_trigger_ass_on_pacch(dl_tbf, tbf); return 0; } void gprs_rlcmac_dl_tbf::schedule_next_frame() { struct msgb *msg; if (llc_frame_length(&m_llc) != 0) return; /* dequeue next LLC frame, if any */ msg = llc_queue_dequeue(llc_queue(), &m_llc.prio, &m_llc.meta_info); if (!msg) return; LOGPTBFDL(this, LOGL_DEBUG, "Dequeue next LLC (len=%d)\n", msg->len); llc_put_frame(&m_llc, msg->data, msg->len); bts_do_rate_ctr_inc(bts, CTR_LLC_FRAME_SCHED); msgb_free(msg); m_last_dl_drained_fn = -1; } int gprs_rlcmac_dl_tbf::create_new_bsn(const uint32_t fn, enum CodingScheme cs) { uint8_t *data; gprs_rlc_data *rlc_data; const uint16_t bsn = m_window.v_s(); gprs_rlc_data_block_info *rdbi; int num_chunks = 0; int write_offset = 0; Encoding::AppendResult ar; if (llc_frame_length(&m_llc) == 0) schedule_next_frame(); OSMO_ASSERT(mcs_is_valid(cs)); /* length of usable data block (single data unit w/o header) */ const uint8_t block_data_len = mcs_max_data_block_bytes(cs); /* now we still have untransmitted LLC data, so we fill mac block */ rlc_data = m_rlc.block(bsn); data = prepare(rlc_data, block_data_len); rlc_data->cs_last = cs; rlc_data->cs_current_trans = cs; /* Initialise the variable related to DL SPB */ rlc_data->spb_status.block_status_dl = EGPRS_RESEG_DL_DEFAULT; rlc_data->cs_init = cs; rlc_data->len = block_data_len; rdbi = &(rlc_data->block_info); memset(rdbi, 0, sizeof(*rdbi)); rdbi->data_len = block_data_len; rdbi->cv = 15; /* Final Block Indicator, set late, if true */ rdbi->bsn = bsn; /* Block Sequence Number */ rdbi->e = 1; /* Extension bit, maybe set later (1: no extension) */ do { bool is_final; int payload_written = 0; if (llc_frame_length(&m_llc) == 0) { /* The data just drained, store the current fn */ if (m_last_dl_drained_fn < 0) m_last_dl_drained_fn = fn; /* It is not clear, when the next real data will * arrive, so request a DL ack/nack now */ request_dl_ack(); int space = block_data_len - write_offset; if (num_chunks != 0) { /* Nothing to send, and we already put some data in * rlcmac data block, we are done */ LOGPTBFDL(this, LOGL_DEBUG, "LLC queue completely drained and there's " "still %d free bytes in rlcmac data block\n", space); /* We may need to update fbi in header here * since m_last_dl_drained_fn was updated above * Specially important when X2031 is 0. */ is_final = llc_queue_size(llc_queue()) == 0 && !keep_open(fn); if (is_final) { rdbi->cv = 0; osmo_fsm_inst_dispatch(this->state_fi, TBF_EV_LAST_DL_DATA_SENT, NULL); } if (mcs_is_edge(cs)) { /* in EGPRS there's no M bit, so we need * to flag padding with LI=127 */ Encoding::rlc_data_to_dl_append_egprs_li_padding(rdbi, &write_offset, &num_chunks, data); } break; } /* Nothing to send from upper layers (LLC), but still * requested to send something to MS to delay the * release of the TBF. See 3GPP TS 44.060 9.3.1a * "Delayed release of downlink Temporary Block Flow" */ /* A header will need to by added, so we just need * space-1 octets */ llc_put_dummy_frame(&m_llc, space - 1); LOGPTBFDL(this, LOGL_DEBUG, "Empty chunk, added LLC dummy command of size %d, drained_since=%d\n", llc_frame_length(&m_llc), frames_since_last_drain(fn)); } is_final = llc_queue_size(llc_queue()) == 0 && !keep_open(fn); ar = Encoding::rlc_data_to_dl_append(rdbi, cs, &m_llc, &write_offset, &num_chunks, data, is_final, &payload_written); if (payload_written > 0) bts_do_rate_ctr_add(bts, CTR_RLC_DL_PAYLOAD_BYTES, payload_written); if (ar == Encoding::AR_NEED_MORE_BLOCKS) break; LOGPTBFDL(this, LOGL_DEBUG, "Complete DL frame, len=%d\n", llc_frame_length(&m_llc)); gprs_rlcmac_dl_bw(this, llc_frame_length(&m_llc)); bts_do_rate_ctr_add(bts, CTR_LLC_DL_BYTES, llc_frame_length(&m_llc)); /* Keep transmitted LLC PDUs until first ACK to avoid lossing them if MS is not there. */ if (!this->m_first_dl_ack_rcvd) { struct gprs_dl_llc_llist_item *llc_it = talloc(this, struct gprs_dl_llc_llist_item); memcpy(&llc_it->llc, &m_llc, sizeof(llc_it->llc)); /* Prepend to list to store them in inverse order of transmission, see * dl_tbf_copy_unacked_pdus_to_llc_queue() for the complete picture. */ llist_add(&llc_it->list, &this->tx_llc_until_first_dl_ack_rcvd); } llc_reset(&m_llc); if (is_final) { request_dl_ack(); osmo_fsm_inst_dispatch(this->state_fi, TBF_EV_LAST_DL_DATA_SENT, NULL); } /* dequeue next LLC frame, if any */ schedule_next_frame(); } while (ar == Encoding::AR_COMPLETED_SPACE_LEFT); LOGPTBFDL(this, LOGL_DEBUG, "data block (BSN %d, %s): %s\n", bsn, mcs_name(rlc_data->cs_last), osmo_hexdump(rlc_data->block, block_data_len)); /* raise send state and set ack state array */ m_window.m_v_b.mark_unacked(bsn); m_window.increment_send(); return bsn; } struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block( const uint32_t fn, const struct gprs_rlcmac_pdch *pdch, int index, int index2) { uint8_t *msg_data; struct msgb *dl_msg; unsigned msg_len; /* TODO: support MCS-7 - MCS-9, where data_block_idx can be 1 */ uint8_t data_block_idx = 0; unsigned int rrbp; uint32_t new_poll_fn; int rc; bool is_final = false; gprs_rlc_data_info rlc; enum CodingScheme cs; int bsns[ARRAY_SIZE(rlc.block_info)]; unsigned num_bsns; bool need_padding = false; enum egprs_rlcmac_dl_spb spb = EGPRS_RLCMAC_DL_NO_RETX; unsigned int spb_status = get_egprs_dl_spb_status(index); enum egprs_puncturing_values punct[2] = { EGPRS_PS_INVALID, EGPRS_PS_INVALID }; osmo_static_assert(ARRAY_SIZE(rlc.block_info) == 2, rlc_block_info_size_is_two); /* * TODO: This is an experimental work-around to put 2 BSN into * MSC-7 to MCS-9 encoded messages. It just sends the same BSN * twice in the block. The cs should be derived from the TBF's * current CS such that both BSNs (that must be compatible) can * be put into the data area, even if the resulting CS is higher than * the current limit. */ cs = m_rlc.block(index)->cs_current_trans; enum CodingScheme cs_init = m_rlc.block(index)->cs_init; bsns[0] = index; num_bsns = 1; if (index2 >= 0) { bsns[num_bsns] = index2; num_bsns += 1; } update_coding_scheme_counter_dl(cs); /* * if the intial mcs is 8 and retransmission mcs is either 6 or 3 * we have to include the padding of 6 octets in first segment */ if ((cs_init == MCS8) && (cs == MCS6 || cs == MCS3)) { if (spb_status == EGPRS_RESEG_DL_DEFAULT || spb_status == EGPRS_RESEG_SECOND_SEG_SENT) need_padding = true; } else if (num_bsns == 1) { /* TODO: remove the conditional when MCS-6 padding isn't * failing to be decoded by MEs anymore */ /* TODO: support of MCS-8 -> MCS-6 transition should be * handled * Refer commit be881c028fc4da00c4046ecd9296727975c206a3 * dated 2016-02-07 23:45:40 (UTC) */ if (cs != MCS8) mcs_dec_to_single_block(&cs, &need_padding); } spb = get_egprs_dl_spb(index); LOGPTBFDL(this, LOGL_DEBUG, "need_padding %d spb_status %d spb %d (BSN1 %d BSN2 %d)\n", need_padding, spb_status, spb, index, index2); gprs_rlc_data_info_init_dl(&rlc, cs, need_padding, spb); rlc.usf = 7; /* will be set at scheduler */ rlc.pr = 0; /* FIXME: power reduction */ rlc.tfi = m_tfi; /* TFI */ /* return data block(s) as message */ msg_len = mcs_size_dl(cs); dl_msg = msgb_alloc(msg_len, "rlcmac_dl_data"); if (!dl_msg) return NULL; msg_data = msgb_put(dl_msg, msg_len); OSMO_ASSERT(rlc.num_data_blocks <= ARRAY_SIZE(rlc.block_info)); OSMO_ASSERT(rlc.num_data_blocks > 0); LOGPTBFDL(this, LOGL_DEBUG, "Copying %u RLC blocks, %u BSNs\n", rlc.num_data_blocks, num_bsns); /* Copy block(s) to RLC message: the num_data_blocks cannot be more than 2 - see assert above */ for (data_block_idx = 0; data_block_idx < OSMO_MIN(rlc.num_data_blocks, 2); data_block_idx++) { int bsn; uint8_t *block_data; gprs_rlc_data_block_info *rdbi, *block_info; enum egprs_rlc_dl_reseg_bsn_state reseg_status; /* Check if there are more blocks than BSNs */ if (data_block_idx < num_bsns) bsn = bsns[data_block_idx]; else bsn = bsns[0]; /* Get current puncturing scheme from block */ m_rlc.block(bsn)->next_ps = gprs_get_punct_scheme( m_rlc.block(bsn)->next_ps, m_rlc.block(bsn)->cs_last, cs, spb); if (mcs_is_edge(cs)) { OSMO_ASSERT(m_rlc.block(bsn)->next_ps >= EGPRS_PS_1); OSMO_ASSERT(m_rlc.block(bsn)->next_ps <= EGPRS_PS_3); } punct[data_block_idx] = m_rlc.block(bsn)->next_ps; rdbi = &rlc.block_info[data_block_idx]; block_info = &m_rlc.block(bsn)->block_info; /* * get data and header from current block * function returns the reseg status */ reseg_status = egprs_dl_get_data(bsn, &block_data); m_rlc.block(bsn)->spb_status.block_status_dl = reseg_status; /* * If it is first segment of the split block set the state of * bsn to nacked. If it is the first segment dont update the * next ps value of bsn. since next segment also needs same cps */ if (spb == EGPRS_RLCMAC_DL_FIRST_SEG) m_window.m_v_b.mark_nacked(bsn); else { /* * TODO: Need to handle 2 same bsns * in header type 1 */ gprs_update_punct_scheme(&m_rlc.block(bsn)->next_ps, cs); } m_rlc.block(bsn)->cs_last = cs; rdbi->e = block_info->e; rdbi->cv = block_info->cv; rdbi->bsn = bsn; is_final = is_final || rdbi->cv == 0; LOGPTBFDL(this, LOGL_DEBUG, "Copying data unit %d (BSN %d)\n", data_block_idx, bsn); Encoding::rlc_copy_from_aligned_buffer(&rlc, data_block_idx, msg_data, block_data); } /* Calculate CPS only for EGPRS case */ if (mcs_is_edge(cs)) rlc.cps = gprs_rlc_mcs_cps(cs, punct[0], punct[1], need_padding); /* If the TBF has just started, relate frames_since_last_poll to the * current fn */ if (m_last_dl_poll_fn < 0) m_last_dl_poll_fn = fn; /* poll after POLL_ACK_AFTER_FRAMES frames, or when final block is tx or * when last polled DL ACK/NACK was lost. Always do so in the control TS. */ if (tbf_is_control_ts(dl_tbf_as_tbf(this), pdch) && need_poll_for_dl_ack_nack()) { if (m_dl_ack_requested) { LOGPTBFDL(this, LOGL_DEBUG, "Scheduling Ack/Nack polling, because it was requested explicitly " "(e.g. first final block sent).\n"); } else if (m_last_dl_poll_ack_lost) { LOGPTBFDL(this, LOGL_DEBUG, "Scheduling Ack/Nack polling, because polling timed out.\n"); } else { LOGPTBFDL(this, LOGL_DEBUG, "Scheduling Ack/Nack polling, because %d blocks sent.\n", POLL_ACK_AFTER_FRAMES); } rc = tbf_check_polling(this, pdch, fn, &new_poll_fn, &rrbp); if (rc >= 0) { tbf_set_polling(this, pdch, new_poll_fn, PDCH_ULC_POLL_DL_ACK); LOGPTBFDL(this, LOGL_DEBUG, "Scheduled DL Acknowledgement polling on PACCH (FN=%d, TS=%d)\n", new_poll_fn, pdch->ts_no); m_tx_counter = 0; /* start timer whenever we send the final block */ if (is_final) T_START(this, T3191, 3191, "final block (DL-TBF)", true); /* Clear request flag */ m_dl_ack_requested = false; /* clear poll timeout flag */ m_last_dl_poll_ack_lost = false; /* set polling in header */ rlc.rrbp = rrbp; rlc.es_p = 1; /* Polling */ m_last_dl_poll_fn = new_poll_fn; LOGPTBFDL(this, LOGL_INFO, "Scheduled Ack/Nack polling on FN=%d, TS=%d\n", new_poll_fn, pdch->ts_no); } } Encoding::rlc_write_dl_data_header(&rlc, msg_data); LOGPTBFDL(this, LOGL_DEBUG, "msg block (BSN %d, %s%s): %s\n", index, mcs_name(cs), need_padding ? ", padded" : "", msgb_hexdump(dl_msg)); /* Increment TX-counter */ m_tx_counter++; return dl_msg; } static uint16_t bitnum_to_bsn(int bitnum, uint16_t ssn) { return ssn - 1 - bitnum; } int gprs_rlcmac_dl_tbf::analyse_errors(char *show_rbb, uint8_t ssn, ana_result *res) { gprs_rlc_data *rlc_data; uint16_t lost = 0, received = 0, skipped = 0; char info[RLC_MAX_WS + 1]; memset(info, '.', m_window.ws()); info[m_window.ws()] = 0; uint16_t bsn = 0; unsigned received_bytes = 0, lost_bytes = 0; unsigned received_packets = 0, lost_packets = 0; unsigned num_blocks = strlen(show_rbb); unsigned distance = m_window.distance(); num_blocks = num_blocks > distance ? distance : num_blocks; /* SSN - 1 is in range V(A)..V(S)-1 */ for (unsigned int bitpos = 0; bitpos < num_blocks; bitpos++) { bool is_received; int index = num_blocks - 1 - bitpos; is_received = (index >= 0 && show_rbb[index] == 'R'); bsn = m_window.mod_sns(bitnum_to_bsn(bitpos, ssn)); if (bsn == m_window.mod_sns(m_window.v_a() - 1)) { info[bitpos] = '$'; break; } rlc_data = m_rlc.block(bsn); if (!rlc_data) { info[bitpos] = '0'; continue; } /* Get general statistics */ if (is_received && !m_window.m_v_b.is_acked(bsn)) { received_packets += 1; received_bytes += rlc_data->len; } else if (!is_received && !m_window.m_v_b.is_nacked(bsn)) { lost_packets += 1; lost_bytes += rlc_data->len; } /* Get statistics for current CS */ if (rlc_data->cs_last != current_cs()) { /* This block has already been encoded with a different * CS, so it doesn't help us to decide, whether the * current CS is ok. Ignore it. */ info[bitpos] = 'x'; skipped += 1; continue; } if (is_received) { if (!m_window.m_v_b.is_acked(bsn)) { received += 1; info[bitpos] = 'R'; } else { info[bitpos] = 'r'; } } else { info[bitpos] = 'L'; lost += 1; } } LOGPTBFDL(this, LOGL_DEBUG, "DL analysis, range=%d:%d, lost=%d, recv=%d, skipped=%d, bsn=%d, info='%s'\n", m_window.v_a(), m_window.v_s(), lost, received, skipped, bsn, info); res->received_packets = received_packets; res->lost_packets = lost_packets; res->received_bytes = received_bytes; res->lost_bytes = lost_bytes; if (lost + received <= 1) return -1; return lost * 100 / (lost + received); } gprs_rlc_window *gprs_rlcmac_dl_tbf::window() { return &m_window; } int gprs_rlcmac_dl_tbf::update_window(unsigned first_bsn, const struct bitvec *rbb) { unsigned dist; uint16_t lost = 0, received = 0; char show_v_b[RLC_MAX_SNS + 1]; char show_rbb[RLC_MAX_SNS + 1]; int error_rate; struct ana_result ana_res; dist = m_window.distance(); unsigned num_blocks = rbb->cur_bit > dist ? dist : rbb->cur_bit; unsigned behind_last_bsn = m_window.mod_sns(first_bsn + num_blocks); Decoding::extract_rbb(rbb, show_rbb); /* show received array in debug */ LOGPTBFDL(this, LOGL_DEBUG, "ack: (BSN=%d)\"%s\"(BSN=%d) R=ACK I=NACK\n", first_bsn, show_rbb, m_window.mod_sns(behind_last_bsn - 1)); error_rate = analyse_errors(show_rbb, behind_last_bsn, &ana_res); if (the_pcu->vty.cs_adj_enabled && ms()) ms_update_error_rate(ms(), this, error_rate); m_window.update(bts, rbb, first_bsn, &lost, &received); rate_ctr_add(rate_ctr_group_get_ctr(m_ctrs, TBF_CTR_RLC_NACKED), lost); /* report lost and received packets */ gprs_rlcmac_received_lost(this, received, lost); /* Used to measure the leak rate */ gprs_bssgp_update_bytes_received(ana_res.received_bytes, ana_res.received_packets + ana_res.lost_packets); /* raise V(A), if possible */ m_window.raise(m_window.move_window()); /* show receive state array in debug (V(A)..V(S)-1) */ m_window.show_state(show_v_b); LOGPTBFDL(this, LOGL_DEBUG, "V(B): (V(A)=%d)\"%s\"(V(S)-1=%d) A=Acked N=Nacked U=Unacked X=Resend-Unacked I=Invalid\n", m_window.v_a(), show_v_b, m_window.v_s_mod(-1)); return 0; } int gprs_rlcmac_dl_tbf::rcvd_dl_final_ack() { uint16_t received; int rc; /* range V(A)..V(S)-1 */ received = m_window.count_unacked(); /* report all outstanding packets as received */ gprs_rlcmac_received_lost(this, received, 0); m_tx_counter = 0; m_window.reset(); rc = osmo_fsm_inst_dispatch(this->state_fi, TBF_EV_FINAL_ACK_RECVD, NULL); return rc; } int gprs_rlcmac_dl_tbf::rcvd_dl_ack(bool final_ack, unsigned first_bsn, struct bitvec *rbb) { int rc; LOGPTBFDL(this, LOGL_DEBUG, "downlink acknowledge\n"); if (m_first_dl_ack_rcvd == false) { /* MS is there, free temporarily stored transmitted LLC PDUs */ struct gprs_dl_llc_llist_item *llc_it; while ((llc_it = llist_first_entry_or_null(&this->tx_llc_until_first_dl_ack_rcvd, struct gprs_dl_llc_llist_item, list))) { llist_del(&llc_it->list); talloc_free(llc_it); } m_first_dl_ack_rcvd = true; } m_last_dl_poll_ack_lost = false; /* reset N3105 */ n_reset(N3105); t_stop(T3191, "ACK/NACK received"); rc = update_window(first_bsn, rbb); if (final_ack) { LOGPTBFDL(this, LOGL_DEBUG, "Final ACK received.\n"); rc = rcvd_dl_final_ack(); } else if (state_is(TBF_ST_FINISHED) && m_window.window_empty()) { LOGPTBFDL(this, LOGL_NOTICE, "Received acknowledge of all blocks, but without final ack indication (don't worry)\n"); } return rc; } bool gprs_rlcmac_dl_tbf::dl_window_stalled() const { return m_window.window_stalled(); } void gprs_rlcmac_dl_tbf::request_dl_ack() { m_dl_ack_requested = true; } void dl_tbf_request_dl_ack(struct gprs_rlcmac_dl_tbf *dl_tbf) { dl_tbf->request_dl_ack(); } bool dl_tbf_first_dl_ack_rcvd(const struct gprs_rlcmac_dl_tbf *tbf) { return tbf->m_first_dl_ack_rcvd; } /* Copy back to GprsMs' llc_queue the LLC PDUs previously dequeued and never * fully ACKED at the MS side. * FIXME: For now, only blocks transmitted and without first ever DL ACK are * copied, because we have no way yet to track LLC PDUs once they are converted * to RLC blocks. This is however enough to cover the case where a DL TBF is * assigned over PCH and the MS never answers. */ void dl_tbf_copy_unacked_pdus_to_llc_queue(struct gprs_rlcmac_dl_tbf *tbf) { struct GprsMs *ms = tbf_ms(dl_tbf_as_tbf(tbf)); struct gprs_dl_llc_llist_item *llc_it; /* If we have LLC PDU still being transmitted, prepend it first to the queue: */ if (llc_frame_length(&tbf->m_llc) > 0) llc_queue_merge_prepend(&ms->llc_queue, &tbf->m_llc); /* Iterate over the list of totally transmitted LLC PDUs and merge them * into the queue. The items in the list are in inverse order of * transmission, hence when popping from here and enqueueing (prepending) * back to the llc_queue it ends up in the exact same initial order. */ while ((llc_it = llist_first_entry_or_null(&tbf->tx_llc_until_first_dl_ack_rcvd, struct gprs_dl_llc_llist_item, list))) { llist_del(&llc_it->list); llc_queue_merge_prepend(&ms->llc_queue, &llc_it->llc); talloc_free(llc_it); } } /* Does this DL TBF require to poll the MS for DL ACK/NACK? */ bool gprs_rlcmac_dl_tbf::need_poll_for_dl_ack_nack() const { /* poll after POLL_ACK_AFTER_FRAMES frames, or when final block is tx or * when last polled DL ACK/NACK was lost. */ return m_last_dl_poll_ack_lost || m_tx_counter >= POLL_ACK_AFTER_FRAMES || m_dl_ack_requested; } bool gprs_rlcmac_dl_tbf::have_data() const { return llc_chunk_size(&m_llc) > 0 || (llc_queue_size(llc_queue()) > 0); } static inline int frames_since_last(int32_t last, unsigned fn) { unsigned wrapped = (fn + GSM_MAX_FN - last) % GSM_MAX_FN; if (last < 0) return -1; if (wrapped < GSM_MAX_FN/2) return wrapped; return wrapped - GSM_MAX_FN; } int gprs_rlcmac_dl_tbf::frames_since_last_poll(unsigned fn) const { return frames_since_last(m_last_dl_poll_fn, fn); } int gprs_rlcmac_dl_tbf::frames_since_last_drain(unsigned fn) const { return frames_since_last(m_last_dl_drained_fn, fn); } bool gprs_rlcmac_dl_tbf::keep_open(unsigned fn) const { int keep_time_frames; unsigned long dl_tbf_idle_msec; int since_last_drain; bool keep; dl_tbf_idle_msec = osmo_tdef_get(the_pcu->T_defs, -2031, OSMO_TDEF_MS, -1); if (dl_tbf_idle_msec == 0) return false; keep_time_frames = msecs_to_frames(dl_tbf_idle_msec); since_last_drain = frames_since_last_drain(fn); keep = since_last_drain <= keep_time_frames; if (since_last_drain >= 0) LOGPTBFDL(this, LOGL_DEBUG, "Keep idle TBF open: %d/%d -> %s\n", since_last_drain, keep_time_frames, keep ? "yes" : "no"); return keep; } /* * This function returns the pointer to data which needs * to be copied. Also updates the status of the block related to * Split block handling in the RLC/MAC block. */ enum egprs_rlc_dl_reseg_bsn_state gprs_rlcmac_dl_tbf::egprs_dl_get_data(int bsn, uint8_t **block_data) { gprs_rlc_data *rlc_data = m_rlc.block(bsn); egprs_rlc_dl_reseg_bsn_state *block_status_dl = &rlc_data->spb_status.block_status_dl; enum CodingScheme cs_init = rlc_data->cs_init; enum CodingScheme cs_current_trans = rlc_data->cs_current_trans; enum HeaderType ht_cs_init = mcs_header_type(rlc_data->cs_init); enum HeaderType ht_cs_current_trans = mcs_header_type(rlc_data->cs_current_trans); *block_data = &rlc_data->block[0]; /* * Table 10.3a.0.1 of 44.060 * MCS6,9: second segment starts at 74/2 = 37 * MCS5,7: second segment starts at 56/2 = 28 * MCS8: second segment starts at 31 * MCS4: second segment starts at 44/2 = 22 */ if (ht_cs_current_trans == HEADER_EGPRS_DATA_TYPE_3) { if (*block_status_dl == EGPRS_RESEG_FIRST_SEG_SENT) { switch (cs_init) { case MCS6 : case MCS9 : *block_data = &rlc_data->block[37]; break; case MCS7 : case MCS5 : *block_data = &rlc_data->block[28]; break; case MCS8 : *block_data = &rlc_data->block[31]; break; case MCS4 : *block_data = &rlc_data->block[22]; break; default: LOGPTBFDL(this, LOGL_ERROR, "FIXME: Software error: hit invalid condition. " "headerType(%d) blockstatus(%d) cs(%s) PLEASE FIX!\n", ht_cs_current_trans, *block_status_dl, mcs_name(cs_init)); break; } return EGPRS_RESEG_SECOND_SEG_SENT; } else if ((ht_cs_init == HEADER_EGPRS_DATA_TYPE_1) || (ht_cs_init == HEADER_EGPRS_DATA_TYPE_2)) { return EGPRS_RESEG_FIRST_SEG_SENT; } else if ((cs_init == MCS4) && (cs_current_trans == MCS1)) { return EGPRS_RESEG_FIRST_SEG_SENT; } } return EGPRS_RESEG_DL_DEFAULT; } /* * This function returns the status of split block * for RLC/MAC block. */ unsigned int gprs_rlcmac_dl_tbf::get_egprs_dl_spb_status(const int bsn) { const gprs_rlc_data *rlc_data = m_rlc.block(bsn); return rlc_data->spb_status.block_status_dl; } /* * This function returns the spb value to be sent OTA * for RLC/MAC block. */ enum egprs_rlcmac_dl_spb gprs_rlcmac_dl_tbf::get_egprs_dl_spb(const int bsn) { struct gprs_rlc_data *rlc_data = m_rlc.block(bsn); egprs_rlc_dl_reseg_bsn_state block_status_dl = rlc_data->spb_status.block_status_dl; enum CodingScheme cs_init = rlc_data->cs_init; enum CodingScheme cs_current_trans = rlc_data->cs_current_trans; enum HeaderType ht_cs_init = mcs_header_type(rlc_data->cs_init); enum HeaderType ht_cs_current_trans = mcs_header_type(rlc_data->cs_current_trans); /* Table 10.4.8b.1 of 44.060 */ if (ht_cs_current_trans == HEADER_EGPRS_DATA_TYPE_3) { /* * if we are sending the second segment the spb should be 3 * otherwise it should be 2 */ if (block_status_dl == EGPRS_RESEG_FIRST_SEG_SENT) { /* statistics */ bts_do_rate_ctr_inc(bts, CTR_SPB_DL_SECOND_SEGMENT); return EGPRS_RLCMAC_DL_SEC_SEG; } else if ((ht_cs_init == HEADER_EGPRS_DATA_TYPE_1) || (ht_cs_init == HEADER_EGPRS_DATA_TYPE_2)) { bts_do_rate_ctr_inc(bts, CTR_SPB_DL_FIRST_SEGMENT); return EGPRS_RLCMAC_DL_FIRST_SEG; } else if ((cs_init == MCS4) && (cs_current_trans == MCS1)) { bts_do_rate_ctr_inc(bts, CTR_SPB_DL_FIRST_SEGMENT); return EGPRS_RLCMAC_DL_FIRST_SEG; } } /* Non SPB cases 0 is reurned */ return EGPRS_RLCMAC_DL_NO_RETX; } void gprs_rlcmac_dl_tbf::set_window_size() { const struct gprs_rlcmac_bts *b = bts; uint16_t ws = egprs_window_size(b, dl_slots()); LOGPTBFDL(this, LOGL_INFO, "setting EGPRS DL window size to %u, base(%u) slots(%u) ws_pdch(%u)\n", ws, bts->pcu->vty.ws_base, pcu_bitcount(dl_slots()), bts->pcu->vty.ws_pdch); m_window.set_ws(ws); } void gprs_rlcmac_dl_tbf::update_coding_scheme_counter_dl(enum CodingScheme cs) { switch (cs) { case CS1: bts_do_rate_ctr_inc(bts, CTR_GPRS_DL_CS1); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_gprs_ctrs, TBF_CTR_GPRS_DL_CS1)); break; case CS2: bts_do_rate_ctr_inc(bts, CTR_GPRS_DL_CS2); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_gprs_ctrs, TBF_CTR_GPRS_DL_CS2)); break; case CS3: bts_do_rate_ctr_inc(bts, CTR_GPRS_DL_CS3); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_gprs_ctrs, TBF_CTR_GPRS_DL_CS3)); break; case CS4: bts_do_rate_ctr_inc(bts, CTR_GPRS_DL_CS4); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_gprs_ctrs, TBF_CTR_GPRS_DL_CS4)); break; case MCS1: bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS1); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS1)); break; case MCS2: bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS2); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS2)); break; case MCS3: bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS3); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS3)); break; case MCS4: bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS4); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS4)); break; case MCS5: bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS5); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS5)); break; case MCS6: bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS6); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS6)); break; case MCS7: bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS7); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS7)); break; case MCS8: bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS8); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS8)); break; case MCS9: bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS9); rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS9)); break; default: LOGPTBFDL(this, LOGL_ERROR, "attempting to update rate counters for unsupported (M)CS %s\n", mcs_name(cs)); } } struct gprs_rlcmac_dl_tbf *tbf_as_dl_tbf(struct gprs_rlcmac_tbf *tbf) { if (tbf && tbf->direction == GPRS_RLCMAC_DL_TBF) return static_cast(tbf); else return NULL; } const struct gprs_rlcmac_dl_tbf *tbf_as_dl_tbf_const(const struct gprs_rlcmac_tbf *tbf) { if (tbf && tbf->direction == GPRS_RLCMAC_DL_TBF) return static_cast(tbf); else return NULL; }