| |
| /* |
| * (C) 2022 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| * All Rights Reserved |
| * |
| * Author: Eric Wild <ewild@sysmocom.de> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| #include "GSMCommon.h" |
| #include <atomic> |
| #include <cassert> |
| |
| #include <iostream> |
| #include <cstdlib> |
| #include <cstdio> |
| |
| #include "ms.h" |
| |
| #include "threadsched.h" |
| |
| dummylog ms_trx::dummy_log; |
| |
| #ifdef DBGXX |
| const int offsetrange = 200; |
| const int offset_start = -15; |
| static int offset_ctr = 0; |
| #endif |
| |
| template <> |
| std::atomic<bool> ms_trx::base::stop_lower_threads_flag(false); |
| |
| int ms_trx::init_dev_and_streams() |
| { |
| int status = 0; |
| status = init_device(rx_bh(), tx_bh()); |
| if (status < 0) { |
| std::cerr << "failed to init dev!" << std::endl; |
| return -1; |
| } |
| return status; |
| } |
| |
| bh_fn_t ms_trx::rx_bh() |
| { |
| return [this](dev_buf_t *rcd) -> int { |
| if (this->search_for_sch(rcd) == SCH_STATE::FOUND) |
| this->grab_bursts(rcd); |
| return 0; |
| }; |
| } |
| |
| bh_fn_t ms_trx::tx_bh() |
| { |
| return [this](dev_buf_t *rcd) -> int { |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wunused-variable" |
| auto y = this; |
| #pragma GCC diagnostic pop |
| /* nothing to do here */ |
| return 0; |
| }; |
| } |
| |
| void ms_trx::start_lower_ms() |
| { |
| if (stop_lower_threads_flag) |
| return; |
| auto fn = get_rx_burst_handler_fn(rx_bh()); |
| lower_rx_task = spawn_worker_thread(sched_params::thread_names::RXRUN, fn, this); |
| |
| usleep(1000); |
| auto fn2 = get_tx_burst_handler_fn(tx_bh()); |
| lower_tx_task = spawn_worker_thread(sched_params::thread_names::TXRUN, fn2, this); |
| |
| actually_enable_streams(); |
| } |
| |
| void ms_trx::set_upper_ready(bool is_ready) |
| { |
| upper_is_ready = is_ready; |
| } |
| |
| void ms_trx::stop_threads() |
| { |
| std::cerr << "killing threads..." << std::endl; |
| stop_lower_threads_flag = true; |
| close_device(); |
| std::cerr << "dev closed..." << std::endl; |
| pthread_join(lower_rx_task, nullptr); |
| std::cerr << "L rx dead..." << std::endl; |
| pthread_join(lower_tx_task, nullptr); |
| std::cerr << "L tx dead..." << std::endl; |
| } |
| |
| void ms_trx::submit_burst(blade_sample_type *buffer, int len, GSM::Time target) |
| { |
| int64_t now_ts; |
| GSM::Time now_time; |
| target.incTN(3); // ul dl offset |
| int target_fn = target.FN(); |
| int target_tn = target.TN(); |
| timekeeper.get_both(&now_time, &now_ts); |
| |
| auto diff_fn = GSM::FNDelta(target_fn, now_time.FN()); |
| int diff_tn = (target_tn - (int)now_time.TN()) % 8; |
| auto tosend = GSM::Time(diff_fn, 0); |
| |
| if (diff_tn > 0) |
| tosend.incTN(diff_tn); |
| else |
| tosend.decTN(-diff_tn); |
| |
| // in theory fn equal and tn+3 equal is also a problem... |
| if (diff_fn < 0 || (diff_fn == 0 && (target_tn-now_time.TN() < 3))) { |
| std::cerr << "## TX too late?! fn DIFF:" << diff_fn << " tn LOCAL: " << now_time.TN() |
| << " tn OTHER: " << target_tn << std::endl; |
| return; |
| } |
| |
| int64_t send_ts = now_ts + tosend.FN() * 8 * ONE_TS_BURST_LEN + tosend.TN() * ONE_TS_BURST_LEN - timing_advance; |
| #ifdef DBGXX |
| auto check = now_time + tosend; |
| std::cerr << "## fn DIFF: " << diff_fn << " ## tn DIFF: " << diff_tn << " tn LOCAL/OTHER: " << now_time.TN() |
| << "/" << target_tn << " tndiff" << diff_tn << " tosend:" << tosend.FN() << ":" << tosend.TN() |
| << " check: " << check.FN() << ":" << check.TN() << " target: " << target.FN() << ":" << target.TN() |
| << " ts now: " << now_ts << " target ts:" << send_ts << std::endl; |
| #endif |
| #if 0 |
| auto check = now_time + tosend; |
| unsigned int pad = 4 * 4; |
| blade_sample_type buf2[len + pad]; |
| std::fill(buf2, buf2 + pad, 0); |
| memcpy(&buf2[pad], buffer, len * sizeof(blade_sample_type)); |
| |
| assert(target.FN() == check.FN()); |
| assert(target.TN() == check.TN()); |
| submit_burst_ts(buf2, len + pad, send_ts - pad); |
| #else |
| submit_burst_ts(buffer, len, send_ts); |
| #endif |
| } |