1327 lines
37 KiB
C
1327 lines
37 KiB
C
/*
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* OpenBTS-style TRX interface/protocol handling
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*
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* This file contains the BTS-side implementation of the OpenBTS-style
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* UDP TRX protocol. It manages the clock, control + burst-data UDP
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* sockets and their respective protocol encoding/parsing.
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*
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* Copyright (C) 2013 Andreas Eversberg <jolly@eversberg.eu>
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* Copyright (C) 2016-2017 Harald Welte <laforge@gnumonks.org>
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* Copyright (C) 2019 Vadim Yanitskiy <axilirator@gmail.com>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <netinet/in.h>
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#include <osmocom/core/select.h>
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#include <osmocom/core/socket.h>
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#include <osmocom/core/timer.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/bits.h>
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#include <osmocom/core/fsm.h>
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#include <osmo-bts/phy_link.h>
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#include <osmo-bts/logging.h>
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#include <osmo-bts/bts.h>
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#include <osmo-bts/scheduler.h>
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#include "l1_if.h"
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#include "trx_if.h"
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#include "trx_provision_fsm.h"
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/*
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* socket helper functions
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*/
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/*! convenience wrapper to open socket + fill in osmo_fd */
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static int trx_udp_open(void *priv, struct osmo_fd *ofd, const char *host_local,
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uint16_t port_local, const char *host_remote, uint16_t port_remote,
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int (*cb)(struct osmo_fd *fd, unsigned int what))
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{
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int rc;
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/* Init */
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ofd->fd = -1;
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ofd->cb = cb;
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ofd->data = priv;
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/* Listen / Binds + Connect */
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rc = osmo_sock_init2_ofd(ofd, AF_UNSPEC, SOCK_DGRAM, IPPROTO_UDP, host_local, port_local,
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host_remote, port_remote, OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT);
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if (rc < 0)
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return rc;
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return 0;
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}
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/* close socket + unregister osmo_fd */
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static void trx_udp_close(struct osmo_fd *ofd)
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{
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if (ofd->fd >= 0) {
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osmo_fd_unregister(ofd);
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close(ofd->fd);
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ofd->fd = -1;
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}
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}
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/*
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* TRX clock socket
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*/
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/* get clock from clock socket */
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static int trx_clk_read_cb(struct osmo_fd *ofd, unsigned int what)
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{
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struct phy_link *plink = ofd->data;
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struct phy_instance *pinst = phy_instance_by_num(plink, 0);
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char buf[1500];
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ssize_t len;
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uint32_t fn;
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OSMO_ASSERT(pinst);
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len = recv(ofd->fd, buf, sizeof(buf) - 1, 0);
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if (len <= 0) {
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strerror_r(errno, (char *)buf, sizeof(buf));
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LOGPPHI(pinst, DTRX, LOGL_ERROR,
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"recv() failed on TRXD with rc=%zd (%s)\n", len, buf);
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return len;
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}
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buf[len] = '\0';
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if (!!strncmp(buf, "IND CLOCK ", 10)) {
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LOGPPHI(pinst, DTRX, LOGL_NOTICE,
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"Unknown message on clock port: %s\n", buf);
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return 0;
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}
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if (sscanf(buf, "IND CLOCK %u", &fn) != 1) {
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LOGPPHI(pinst, DTRX, LOGL_ERROR, "Unable to parse '%s'\n", buf);
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return 0;
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}
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LOGPPHI(pinst, DTRX, LOGL_INFO, "Clock indication: fn=%u\n", fn);
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if (fn >= GSM_TDMA_HYPERFRAME) {
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fn %= GSM_TDMA_HYPERFRAME;
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LOGPPHI(pinst, DTRX, LOGL_ERROR, "Indicated clock's FN is not "
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"wrapping correctly, correcting to fn=%u\n", fn);
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}
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if (!plink->u.osmotrx.powered) {
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LOGPPHI(pinst, DTRX, LOGL_NOTICE, "Ignoring CLOCK IND %u, TRX not yet powered on\n", fn);
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return 0;
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}
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/* inform core TRX clock handling code that a FN has been received */
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trx_sched_clock(pinst->trx->bts, fn);
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return 0;
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}
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/*
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* TRX ctrl socket
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*/
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/* send first ctrl message and start timer */
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static void trx_ctrl_send(struct trx_l1h *l1h)
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{
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struct trx_ctrl_msg *tcm;
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char buf[1500];
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int len;
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ssize_t snd_len;
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/* get first command */
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if (llist_empty(&l1h->trx_ctrl_list))
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return;
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tcm = llist_entry(l1h->trx_ctrl_list.next, struct trx_ctrl_msg, list);
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len = snprintf(buf, sizeof(buf), "CMD %s%s%s", tcm->cmd, tcm->params_len ? " ":"", tcm->params);
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OSMO_ASSERT(len < sizeof(buf));
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LOGPPHI(l1h->phy_inst, DTRX, LOGL_DEBUG, "Sending control '%s'\n", buf);
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/* send command */
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snd_len = send(l1h->trx_ofd_ctrl.fd, buf, len+1, 0);
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if (snd_len <= 0) {
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strerror_r(errno, (char *)buf, sizeof(buf));
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LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
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"send() failed on TRXC with rc=%zd (%s)\n", snd_len, buf);
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}
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/* start timer */
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osmo_timer_schedule(&l1h->trx_ctrl_timer, 2, 0);
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}
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/* send first ctrl message and start timer */
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static void trx_ctrl_timer_cb(void *data)
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{
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struct trx_l1h *l1h = data;
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struct trx_ctrl_msg *tcm = NULL;
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/* get first command */
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OSMO_ASSERT(!llist_empty(&l1h->trx_ctrl_list));
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tcm = llist_entry(l1h->trx_ctrl_list.next, struct trx_ctrl_msg, list);
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LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE, "No satisfactory response from transceiver(CMD %s%s%s)\n",
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tcm->cmd, tcm->params_len ? " ":"", tcm->params);
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trx_ctrl_send(l1h);
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}
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void trx_if_init(struct trx_l1h *l1h)
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{
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l1h->trx_ctrl_timer.cb = trx_ctrl_timer_cb;
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l1h->trx_ctrl_timer.data = l1h;
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/* initialize ctrl queue */
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INIT_LLIST_HEAD(&l1h->trx_ctrl_list);
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l1h->trx_ofd_ctrl.fd = -1;
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l1h->trx_ofd_data.fd = -1;
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}
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/*! Send a new TRX control command.
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* \param[inout] l1h TRX Layer1 handle to which to send command
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* \param[in] critical
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* \param[in] cb callback function to be called when valid response is
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* received. Type of cb depends on type of message.
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* \param[in] cmd zero-terminated string containing command
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* \param[in] fmt Format string (+ variable list of arguments)
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* \returns 0 on success; negative on error
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*
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* The new command will be added to the end of the control command
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* queue.
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*/
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static int trx_ctrl_cmd_cb(struct trx_l1h *l1h, int critical, void *cb, const char *cmd,
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const char *fmt, ...)
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{
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struct trx_ctrl_msg *tcm;
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struct trx_ctrl_msg *prev = NULL;
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va_list ap;
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/* create message */
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tcm = talloc_zero(tall_bts_ctx, struct trx_ctrl_msg);
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if (!tcm)
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return -ENOMEM;
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snprintf(tcm->cmd, sizeof(tcm->cmd)-1, "%s", cmd);
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tcm->cmd[sizeof(tcm->cmd)-1] = '\0';
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tcm->cmd_len = strlen(tcm->cmd);
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if (fmt && fmt[0]) {
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va_start(ap, fmt);
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vsnprintf(tcm->params, sizeof(tcm->params) - 1, fmt, ap);
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va_end(ap);
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tcm->params[sizeof(tcm->params)-1] = '\0';
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tcm->params_len = strlen(tcm->params);
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} else {
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tcm->params[0] ='\0';
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tcm->params_len = 0;
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}
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tcm->critical = critical;
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tcm->cb = cb;
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/* Avoid adding consecutive duplicate messages, eg: two consecutive POWEROFF */
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if (!llist_empty(&l1h->trx_ctrl_list))
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prev = llist_entry(l1h->trx_ctrl_list.prev, struct trx_ctrl_msg, list);
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if (prev != NULL && !strcmp(tcm->cmd, prev->cmd)
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&& !strcmp(tcm->params, prev->params)) {
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LOGPPHI(l1h->phy_inst, DTRX, LOGL_DEBUG,
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"Not sending duplicate command '%s'\n", tcm->cmd);
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talloc_free(tcm);
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return 0;
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}
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LOGPPHI(l1h->phy_inst, DTRX, LOGL_INFO, "Enqueuing TRX control command 'CMD %s%s%s'\n",
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tcm->cmd, tcm->params_len ? " " : "", tcm->params);
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llist_add_tail(&tcm->list, &l1h->trx_ctrl_list);
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/* send message, if we didn't already have pending messages */
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if (prev == NULL)
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trx_ctrl_send(l1h);
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return 0;
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}
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#define trx_ctrl_cmd(l1h, critical, cmd, fmt, ...) trx_ctrl_cmd_cb(l1h, critical, NULL, cmd, fmt, ##__VA_ARGS__)
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/*! Send "POWEROFF" command to TRX */
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int trx_if_cmd_poweroff(struct trx_l1h *l1h, trx_if_cmd_poweronoff_cb *cb)
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{
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return trx_ctrl_cmd_cb(l1h, 1, cb, "POWEROFF", "");
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}
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/*! Send "POWERON" command to TRX */
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int trx_if_cmd_poweron(struct trx_l1h *l1h, trx_if_cmd_poweronoff_cb *cb)
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{
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return trx_ctrl_cmd_cb(l1h, 1, cb, "POWERON", "");
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}
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/*! Send "SETFORMAT" command to TRX: change TRXD PDU version */
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int trx_if_cmd_setformat(struct trx_l1h *l1h, uint8_t ver, trx_if_cmd_generic_cb *cb)
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{
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LOGPPHI(l1h->phy_inst, DTRX, LOGL_INFO,
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"Requesting TRXD PDU version %u\n", ver);
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return trx_ctrl_cmd_cb(l1h, 0, cb, "SETFORMAT", "%u", ver);
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}
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/*! Send "SETTSC" command to TRX */
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int trx_if_cmd_settsc(struct trx_l1h *l1h, uint8_t tsc, trx_if_cmd_generic_cb *cb)
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{
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return trx_ctrl_cmd_cb(l1h, 1, cb, "SETTSC", "%d", tsc);
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}
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/*! Send "SETBSIC" command to TRX */
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int trx_if_cmd_setbsic(struct trx_l1h *l1h, uint8_t bsic, trx_if_cmd_generic_cb *cb)
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{
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return trx_ctrl_cmd_cb(l1h, 1, cb, "SETBSIC", "%d", bsic);
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}
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/*! Send "SETRXGAIN" command to TRX */
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int trx_if_cmd_setrxgain(struct trx_l1h *l1h, int db)
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{
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return trx_ctrl_cmd(l1h, 0, "SETRXGAIN", "%d", db);
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}
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/*! Send "NOMTXPOWER" command to TRX */
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int trx_if_cmd_getnompower(struct trx_l1h *l1h, trx_if_cmd_getnompower_cb *cb)
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{
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return trx_ctrl_cmd_cb(l1h, 1, cb, "NOMTXPOWER", "");
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}
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/*! Send "SETPOWER" command to TRX */
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int trx_if_cmd_setpower_att(struct trx_l1h *l1h, int power_att_db, trx_if_cmd_setpower_att_cb *cb)
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{
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return trx_ctrl_cmd_cb(l1h, 0, cb, "SETPOWER", "%d", power_att_db);
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}
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/*! Send "SETMAXDLY" command to TRX, i.e. maximum delay for RACH bursts */
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int trx_if_cmd_setmaxdly(struct trx_l1h *l1h, int dly)
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{
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return trx_ctrl_cmd(l1h, 0, "SETMAXDLY", "%d", dly);
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}
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/*! Send "SETMAXDLYNB" command to TRX, i.e. maximum delay for normal bursts */
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int trx_if_cmd_setmaxdlynb(struct trx_l1h *l1h, int dly)
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{
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return trx_ctrl_cmd(l1h, 0, "SETMAXDLYNB", "%d", dly);
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}
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/*! Send "SETSLOT" command to TRX: Configure Channel Combination for TS */
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int trx_if_cmd_setslot(struct trx_l1h *l1h, uint8_t tn, uint8_t type, trx_if_cmd_setslot_cb *cb)
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{
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return trx_ctrl_cmd_cb(l1h, 1, cb, "SETSLOT", "%d %d", tn, type);
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}
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/*! Send "RXTUNE" command to TRX: Tune Receiver to given ARFCN */
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int trx_if_cmd_rxtune(struct trx_l1h *l1h, uint16_t arfcn, trx_if_cmd_generic_cb *cb)
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{
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struct phy_instance *pinst = l1h->phy_inst;
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uint16_t freq10;
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if (pinst->trx->bts->band == GSM_BAND_1900)
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arfcn |= ARFCN_PCS;
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freq10 = gsm_arfcn2freq10(arfcn, 1); /* RX = uplink */
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if (freq10 == 0xffff) {
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LOGPPHI(pinst, DTRX, LOGL_ERROR, "Arfcn %d not defined.\n",
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arfcn & ~ARFCN_FLAG_MASK);
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return -ENOTSUP;
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}
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return trx_ctrl_cmd_cb(l1h, 1, cb, "RXTUNE", "%d", freq10 * 100);
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}
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/*! Send "TXTUNE" command to TRX: Tune Transmitter to given ARFCN */
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int trx_if_cmd_txtune(struct trx_l1h *l1h, uint16_t arfcn, trx_if_cmd_generic_cb *cb)
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{
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struct phy_instance *pinst = l1h->phy_inst;
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uint16_t freq10;
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if (pinst->trx->bts->band == GSM_BAND_1900)
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arfcn |= ARFCN_PCS;
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freq10 = gsm_arfcn2freq10(arfcn, 0); /* TX = downlink */
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if (freq10 == 0xffff) {
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LOGPPHI(pinst, DTRX, LOGL_ERROR, "Arfcn %d not defined.\n",
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arfcn & ~ARFCN_FLAG_MASK);
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return -ENOTSUP;
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}
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return trx_ctrl_cmd_cb(l1h, 1, cb, "TXTUNE", "%d", freq10 * 100);
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}
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/*! Send "HANDOVER" command to TRX: Enable handover RACH Detection on timeslot/sub-slot */
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int trx_if_cmd_handover(struct trx_l1h *l1h, uint8_t tn, uint8_t ss)
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{
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return trx_ctrl_cmd(l1h, 1, "HANDOVER", "%d %d", tn, ss);
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}
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/*! Send "NOHANDOVER" command to TRX: Disable handover RACH Detection on timeslot/sub-slot */
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int trx_if_cmd_nohandover(struct trx_l1h *l1h, uint8_t tn, uint8_t ss)
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{
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return trx_ctrl_cmd(l1h, 1, "NOHANDOVER", "%d %d", tn, ss);
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}
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|
|
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/*! Send "RFMUTE" command to TRX: Mute or Unmute RF transmission */
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int trx_if_cmd_rfmute(struct trx_l1h *l1h, bool mute)
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{
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return trx_ctrl_cmd(l1h, 0, "RFMUTE", mute ? "1" : "0");
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}
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|
|
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struct trx_ctrl_rsp {
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char cmd[50];
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char params[100];
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int status;
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void *cb;
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};
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|
|
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static int parse_rsp(const char *buf_in, size_t len_in, struct trx_ctrl_rsp *rsp)
|
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{
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char *p, *k;
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|
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if (strncmp(buf_in, "RSP ", 4))
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goto parse_err;
|
|
|
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/* Get the RSP cmd name */
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if (!(p = strchr(buf_in + 4, ' ')))
|
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goto parse_err;
|
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|
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if (p - buf_in >= sizeof(rsp->cmd)) {
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LOGP(DTRX, LOGL_ERROR, "cmd buffer too small %lu >= %zu\n",
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(long unsigned) (p - buf_in), sizeof(rsp->cmd));
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goto parse_err;
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}
|
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|
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rsp->cmd[0] = '\0';
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strncat(rsp->cmd, buf_in + 4, p - buf_in - 4);
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|
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/* Now comes the status code of the response */
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p++;
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if (sscanf(p, "%d", &rsp->status) != 1)
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goto parse_err;
|
|
|
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/* Now copy back the parameters */
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k = strchr(p, ' ');
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if (k)
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k++;
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else
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k = p + strlen(p);
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|
|
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if (strlen(k) >= sizeof(rsp->params)) {
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LOGP(DTRX, LOGL_ERROR, "params buffer too small %zu >= %zu\n",
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strlen(k), sizeof(rsp->params));
|
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goto parse_err;
|
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}
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rsp->params[0] = '\0';
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strcat(rsp->params, k);
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return 0;
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|
|
|
parse_err:
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LOGP(DTRX, LOGL_NOTICE, "Unknown message on ctrl port: %s\n",
|
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buf_in);
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return -1;
|
|
}
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|
|
|
static bool cmd_matches_rsp(struct trx_ctrl_msg *tcm, struct trx_ctrl_rsp *rsp)
|
|
{
|
|
if (strcmp(tcm->cmd, rsp->cmd))
|
|
return false;
|
|
|
|
/* For SETSLOT we also need to check if it's the response for the
|
|
specific timeslot. For other commands such as SETRXGAIN, it is
|
|
expected that they can return different values */
|
|
if (strcmp(tcm->cmd, "SETSLOT") == 0 && strcmp(tcm->params, rsp->params))
|
|
return false;
|
|
else if (strcmp(tcm->cmd, "SETFORMAT") == 0 && strcmp(tcm->params, rsp->params))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static int trx_ctrl_rx_rsp_poweron(struct trx_l1h *l1h, struct trx_ctrl_rsp *rsp)
|
|
{
|
|
trx_if_cmd_poweronoff_cb *cb = (trx_if_cmd_poweronoff_cb*) rsp->cb;
|
|
|
|
if (rsp->status != 0)
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE,
|
|
"transceiver rejected POWERON command (%d), re-trying in a few seconds\n",
|
|
rsp->status);
|
|
|
|
if (cb)
|
|
cb(l1h, true, rsp->status);
|
|
|
|
/* If TRX fails, try again after 5 sec */
|
|
return rsp->status == 0 ? 0 : 5;
|
|
}
|
|
|
|
static int trx_ctrl_rx_rsp_poweroff(struct trx_l1h *l1h, struct trx_ctrl_rsp *rsp)
|
|
{
|
|
trx_if_cmd_poweronoff_cb *cb = (trx_if_cmd_poweronoff_cb*) rsp->cb;
|
|
|
|
if (rsp->status == 0) {
|
|
if (cb)
|
|
cb(l1h, false, rsp->status);
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int trx_ctrl_rx_rsp_setslot(struct trx_l1h *l1h, struct trx_ctrl_rsp *rsp)
|
|
{
|
|
trx_if_cmd_setslot_cb *cb = (trx_if_cmd_setslot_cb*) rsp->cb;
|
|
struct phy_instance *pinst = l1h->phy_inst;
|
|
unsigned int tn, ts_type;
|
|
|
|
if (rsp->status)
|
|
LOGPPHI(pinst, DTRX, LOGL_ERROR, "transceiver SETSLOT failed with status %d\n",
|
|
rsp->status);
|
|
|
|
/* Since message was already validated against CMD we sent, we know format
|
|
* of params is: "<TN> <TS_TYPE>" */
|
|
if (sscanf(rsp->params, "%u %u", &tn, &ts_type) < 2) {
|
|
LOGPPHI(pinst, DTRX, LOGL_ERROR, "transceiver SETSLOT unable to parse params\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (cb)
|
|
cb(l1h, tn, ts_type, rsp->status);
|
|
|
|
return rsp->status == 0 ? 0 : -EINVAL;
|
|
}
|
|
|
|
/* TRXD PDU format negotiation handler.
|
|
*
|
|
* If the transceiver does not support the format negotiation, it would
|
|
* reject SETFORMAT with 'RSP ERR 1'. If the requested version is not
|
|
* supported by the transceiver, status code of the response message
|
|
* should indicate a preferred (basically, the latest) version.
|
|
*/
|
|
static int trx_ctrl_rx_rsp_setformat(struct trx_l1h *l1h,
|
|
struct trx_ctrl_rsp *rsp)
|
|
{
|
|
trx_if_cmd_generic_cb *cb;
|
|
|
|
/* Old transceivers reject 'SETFORMAT' with 'RSP ERR 1' */
|
|
if (strcmp(rsp->cmd, "SETFORMAT") != 0) {
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE,
|
|
"Transceiver rejected the format negotiation command, "
|
|
"using legacy TRXD PDU version (0)\n");
|
|
if (rsp->cb) {
|
|
cb = (trx_if_cmd_generic_cb*) rsp->cb;
|
|
cb(l1h, 0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Status shall indicate a proper version supported by the transceiver */
|
|
if (rsp->status < 0 || rsp->status > l1h->config.trxd_pdu_ver_req) {
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
|
|
"Transceiver indicated an out of range "
|
|
"PDU version %d (requested %u)\n",
|
|
rsp->status, l1h->config.trxd_pdu_ver_req);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (rsp->cb) {
|
|
cb = (trx_if_cmd_generic_cb*) rsp->cb;
|
|
cb(l1h, rsp->status);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int trx_ctrl_rx_rsp_nomtxpower(struct trx_l1h *l1h, struct trx_ctrl_rsp *rsp)
|
|
{
|
|
trx_if_cmd_getnompower_cb *cb = (trx_if_cmd_getnompower_cb*) rsp->cb;
|
|
struct phy_instance *pinst = l1h->phy_inst;
|
|
int nominal_power;
|
|
|
|
if (rsp->status)
|
|
LOGPPHI(pinst, DTRX, LOGL_ERROR, "transceiver NOMTXPOWER failed "
|
|
"with status %d. If your transceiver doesn't support this "
|
|
"command, then please set the nominal transmit power manually "
|
|
"through VTY cmd 'nominal-tx-power'.\n",
|
|
rsp->status);
|
|
if (cb) {
|
|
sscanf(rsp->params, "%d", &nominal_power);
|
|
cb(l1h, nominal_power, rsp->status);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int trx_ctrl_rx_rsp_setpower(struct trx_l1h *l1h, struct trx_ctrl_rsp *rsp)
|
|
{
|
|
trx_if_cmd_setpower_att_cb *cb = (trx_if_cmd_setpower_att_cb*) rsp->cb;
|
|
struct phy_instance *pinst = l1h->phy_inst;
|
|
int power_att;
|
|
|
|
if (rsp->status)
|
|
LOGPPHI(pinst, DTRX, LOGL_ERROR, "transceiver SETPOWER failed with status %d\n",
|
|
rsp->status);
|
|
if (cb) {
|
|
sscanf(rsp->params, "%d", &power_att);
|
|
cb(l1h, power_att, rsp->status);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* -EINVAL: unrecoverable error, exit BTS
|
|
* N > 0: try sending originating command again after N seconds
|
|
* 0: Done with response, get originating command out from send queue
|
|
*/
|
|
static int trx_ctrl_rx_rsp(struct trx_l1h *l1h,
|
|
struct trx_ctrl_rsp *rsp,
|
|
struct trx_ctrl_msg *tcm)
|
|
{
|
|
trx_if_cmd_generic_cb *cb;
|
|
|
|
if (strcmp(rsp->cmd, "POWERON") == 0) {
|
|
return trx_ctrl_rx_rsp_poweron(l1h, rsp);
|
|
} else if (strcmp(rsp->cmd, "POWEROFF") == 0) {
|
|
return trx_ctrl_rx_rsp_poweroff(l1h, rsp);
|
|
} else if (strcmp(rsp->cmd, "SETSLOT") == 0) {
|
|
return trx_ctrl_rx_rsp_setslot(l1h, rsp);
|
|
/* We may get 'RSP ERR 1' if 'SETFORMAT' is not supported,
|
|
* so that's why we should use tcm instead of rsp. */
|
|
} else if (strcmp(tcm->cmd, "SETFORMAT") == 0) {
|
|
return trx_ctrl_rx_rsp_setformat(l1h, rsp);
|
|
} else if (strcmp(tcm->cmd, "NOMTXPOWER") == 0) {
|
|
return trx_ctrl_rx_rsp_nomtxpower(l1h, rsp);
|
|
} else if (strcmp(tcm->cmd, "SETPOWER") == 0) {
|
|
return trx_ctrl_rx_rsp_setpower(l1h, rsp);
|
|
}
|
|
|
|
/* Generic callback if available */
|
|
if (rsp->cb) {
|
|
cb = (trx_if_cmd_generic_cb*) rsp->cb;
|
|
cb(l1h, rsp->status);
|
|
}
|
|
|
|
if (rsp->status) {
|
|
LOGPPHI(l1h->phy_inst, DTRX, tcm->critical ? LOGL_FATAL : LOGL_NOTICE,
|
|
"transceiver rejected TRX command with response: '%s%s%s %d'\n",
|
|
rsp->cmd, rsp->params[0] != '\0' ? " ":"",
|
|
rsp->params, rsp->status);
|
|
if (tcm->critical)
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*! Get + parse response from TRX ctrl socket */
|
|
static int trx_ctrl_read_cb(struct osmo_fd *ofd, unsigned int what)
|
|
{
|
|
struct trx_l1h *l1h = ofd->data;
|
|
struct phy_instance *pinst = l1h->phy_inst;
|
|
char buf[1500];
|
|
struct trx_ctrl_rsp rsp;
|
|
int len, rc;
|
|
struct trx_ctrl_msg *tcm;
|
|
|
|
len = recv(ofd->fd, buf, sizeof(buf) - 1, 0);
|
|
if (len <= 0)
|
|
return len;
|
|
buf[len] = '\0';
|
|
|
|
if (parse_rsp(buf, len, &rsp) < 0)
|
|
return 0;
|
|
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_INFO, "Response message: '%s'\n", buf);
|
|
|
|
/* abort timer and send next message, if any */
|
|
if (osmo_timer_pending(&l1h->trx_ctrl_timer))
|
|
osmo_timer_del(&l1h->trx_ctrl_timer);
|
|
|
|
/* get command for response message */
|
|
if (llist_empty(&l1h->trx_ctrl_list)) {
|
|
/* RSP from a retransmission, skip it */
|
|
if (l1h->last_acked && cmd_matches_rsp(l1h->last_acked, &rsp)) {
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE, "Discarding duplicated RSP "
|
|
"from old CMD '%s'\n", buf);
|
|
return 0;
|
|
}
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE, "Response message without command\n");
|
|
return -EINVAL;
|
|
}
|
|
tcm = llist_entry(l1h->trx_ctrl_list.next, struct trx_ctrl_msg,
|
|
list);
|
|
|
|
/* check if response matches command */
|
|
if (!cmd_matches_rsp(tcm, &rsp)) {
|
|
/* RSP from a retransmission, skip it */
|
|
if (l1h->last_acked && cmd_matches_rsp(l1h->last_acked, &rsp)) {
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE, "Discarding duplicated RSP "
|
|
"from old CMD '%s'\n", buf);
|
|
return 0;
|
|
}
|
|
LOGPPHI(l1h->phy_inst, DTRX, (tcm->critical) ? LOGL_FATAL : LOGL_NOTICE,
|
|
"Response message '%s' does not match command "
|
|
"message 'CMD %s%s%s'\n",
|
|
buf, tcm->cmd, tcm->params_len ? " ":"", tcm->params);
|
|
|
|
/* We may get 'RSP ERR 1' for non-critical commands */
|
|
if (tcm->critical)
|
|
goto rsp_error;
|
|
}
|
|
|
|
rsp.cb = tcm->cb;
|
|
|
|
/* check for response code */
|
|
rc = trx_ctrl_rx_rsp(l1h, &rsp, tcm);
|
|
if (rc == -EINVAL)
|
|
goto rsp_error;
|
|
|
|
/* re-schedule last cmd in rc seconds time */
|
|
if (rc > 0) {
|
|
osmo_timer_schedule(&l1h->trx_ctrl_timer, rc, 0);
|
|
return 0;
|
|
}
|
|
|
|
/* remove command from list, save it to last_acked and removed previous last_acked */
|
|
llist_del(&tcm->list);
|
|
talloc_free(l1h->last_acked);
|
|
l1h->last_acked = tcm;
|
|
|
|
trx_ctrl_send(l1h);
|
|
|
|
return 0;
|
|
|
|
rsp_error:
|
|
bts_shutdown(pinst->trx->bts, "TRX-CTRL-MSG: CRITICAL");
|
|
/* keep tcm list, so process is stopped */
|
|
return -EIO;
|
|
}
|
|
|
|
|
|
/*
|
|
* TRX burst data socket
|
|
*/
|
|
|
|
/* Maximum DATA message length (header + burst) */
|
|
#define TRX_DATA_MSG_MAX_LEN 512
|
|
|
|
/* Common header length: 1/2 VER + 1/2 TDMA TN + 4 TDMA FN */
|
|
#define TRX_CHDR_LEN (1 + 4)
|
|
/* Uplink v0 header length: 1 RSSI + 2 ToA256 */
|
|
#define TRX_UL_V0HDR_LEN (TRX_CHDR_LEN + 1 + 2)
|
|
/* Uplink v1 header length: + 1 MTS + 2 C/I */
|
|
#define TRX_UL_V1HDR_LEN (TRX_UL_V0HDR_LEN + 1 + 2)
|
|
|
|
/* TRXD header dissector for version 0 */
|
|
static int trx_data_handle_hdr_v0(struct trx_l1h *l1h,
|
|
struct trx_ul_burst_ind *bi,
|
|
const uint8_t *buf, size_t buf_len)
|
|
{
|
|
/* Make sure we have enough data */
|
|
if (buf_len < TRX_UL_V0HDR_LEN) {
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
|
|
"Short read on TRXD, missing version 0 header "
|
|
"(len=%zu vs expected %d)\n", buf_len, TRX_UL_V0HDR_LEN);
|
|
return -EIO;
|
|
}
|
|
|
|
bi->tn = buf[0] & 0b111;
|
|
bi->fn = osmo_load32be(buf + 1);
|
|
bi->rssi = -(int8_t)buf[5];
|
|
bi->toa256 = (int16_t) osmo_load16be(buf + 6);
|
|
|
|
if (bi->fn >= GSM_TDMA_HYPERFRAME) {
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
|
|
"Illegal TDMA fn=%u\n", bi->fn);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return TRX_UL_V0HDR_LEN;
|
|
}
|
|
|
|
/* TRXD header dissector for version 0x01 */
|
|
static int trx_data_handle_hdr_v1(struct trx_l1h *l1h,
|
|
struct trx_ul_burst_ind *bi,
|
|
const uint8_t *buf, size_t buf_len)
|
|
{
|
|
uint8_t mts;
|
|
int rc;
|
|
|
|
/* Make sure we have enough data */
|
|
if (buf_len < TRX_UL_V1HDR_LEN) {
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
|
|
"Short read on TRXD, missing version 1 header "
|
|
"(len=%zu vs expected %d)\n", buf_len, TRX_UL_V1HDR_LEN);
|
|
return -EIO;
|
|
}
|
|
|
|
/* Parse v0 specific part */
|
|
rc = trx_data_handle_hdr_v0(l1h, bi, buf, buf_len);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
/* Move closer to the v1 specific part */
|
|
buf_len -= rc;
|
|
buf += rc;
|
|
|
|
/* IDLE / NOPE frame indication */
|
|
if (buf[0] & (1 << 7)) {
|
|
bi->flags |= TRX_BI_F_NOPE_IND;
|
|
goto skip_mts;
|
|
}
|
|
|
|
/* Modulation info and TSC set */
|
|
mts = (buf[0] >> 3) & 0b1111;
|
|
if ((mts & 0b1100) == 0x00) {
|
|
bi->bt = TRX_BURST_GMSK;
|
|
bi->tsc_set = mts & 0b11;
|
|
bi->flags |= TRX_BI_F_MOD_TYPE;
|
|
} else if ((mts & 0b0100) == 0b0100) {
|
|
bi->bt = TRX_BURST_8PSK;
|
|
bi->tsc_set = mts & 0b1;
|
|
bi->flags |= TRX_BI_F_MOD_TYPE;
|
|
} else {
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
|
|
"Indicated modulation 0x%02x is not supported\n", mts & 0b1110);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
/* Training Sequence Code */
|
|
bi->tsc = buf[0] & 0b111;
|
|
bi->flags |= TRX_BI_F_TS_INFO;
|
|
|
|
skip_mts:
|
|
/* C/I: Carrier-to-Interference ratio (in centiBels) */
|
|
bi->ci_cb = (int16_t) osmo_load16be(buf + 1);
|
|
bi->flags |= TRX_BI_F_CI_CB;
|
|
|
|
return TRX_UL_V1HDR_LEN;
|
|
}
|
|
|
|
/* TRXD burst handler for PDU version 0 */
|
|
static int trx_data_handle_burst_v0(struct trx_l1h *l1h,
|
|
struct trx_ul_burst_ind *bi,
|
|
const uint8_t *buf, size_t buf_len)
|
|
{
|
|
size_t i;
|
|
|
|
/* Verify burst length */
|
|
switch (buf_len) {
|
|
/* Legacy transceivers append two padding bytes */
|
|
case EGPRS_BURST_LEN + 2:
|
|
case GSM_BURST_LEN + 2:
|
|
bi->burst_len = buf_len - 2;
|
|
break;
|
|
case EGPRS_BURST_LEN:
|
|
case GSM_BURST_LEN:
|
|
bi->burst_len = buf_len;
|
|
break;
|
|
|
|
default:
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE,
|
|
"Rx TRXD message with odd burst length %zu\n", buf_len);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Convert unsigned soft-bits [254..0] to soft-bits [-127..127] */
|
|
for (i = 0; i < bi->burst_len; i++) {
|
|
if (buf[i] == 255)
|
|
bi->burst[i] = -127;
|
|
else
|
|
bi->burst[i] = 127 - buf[i];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* TRXD burst handler for PDU version 1 */
|
|
static int trx_data_handle_burst_v1(struct trx_l1h *l1h,
|
|
struct trx_ul_burst_ind *bi,
|
|
const uint8_t *buf, size_t buf_len)
|
|
{
|
|
/* Modulation types defined in 3GPP TS 45.002 */
|
|
static const size_t bl[] = {
|
|
[TRX_BURST_GMSK] = 148, /* 1 bit per symbol */
|
|
[TRX_BURST_8PSK] = 444, /* 3 bits per symbol */
|
|
};
|
|
|
|
/* Verify burst length */
|
|
if (bl[bi->bt] != buf_len) {
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE,
|
|
"Rx TRXD message with odd burst length %zu, "
|
|
"expected %zu\n", buf_len, bl[bi->bt]);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* The PDU format is the same as for version 0.
|
|
* NOTE: other modulation types to be handled separately. */
|
|
return trx_data_handle_burst_v0(l1h, bi, buf, buf_len);
|
|
}
|
|
|
|
static const char *trx_data_desc_msg(const struct trx_ul_burst_ind *bi)
|
|
{
|
|
struct osmo_strbuf sb;
|
|
static char buf[256];
|
|
|
|
/* Modulation types defined in 3GPP TS 45.002 */
|
|
static const char *mod_names[] = {
|
|
[TRX_BURST_GMSK] = "GMSK",
|
|
[TRX_BURST_8PSK] = "8-PSK",
|
|
};
|
|
|
|
/* Initialize the string buffer */
|
|
sb = (struct osmo_strbuf) { .buf = buf, .len = sizeof(buf) };
|
|
|
|
/* Common TDMA parameters */
|
|
OSMO_STRBUF_PRINTF(sb, "tn=%u fn=%u", bi->tn, bi->fn);
|
|
|
|
/* RSSI and ToA256 */
|
|
OSMO_STRBUF_PRINTF(sb, " rssi=%d toa256=%d", bi->rssi, bi->toa256);
|
|
|
|
/* C/I: Carrier-to-Interference ratio (in centiBels) */
|
|
if (bi->flags & TRX_BI_F_CI_CB)
|
|
OSMO_STRBUF_PRINTF(sb, " C/I=%d cB", bi->ci_cb);
|
|
|
|
/* Nothing else to print for NOPE.ind */
|
|
if (bi->flags & TRX_BI_F_NOPE_IND)
|
|
return buf;
|
|
|
|
/* Modulation and TSC set */
|
|
if (bi->flags & TRX_BI_F_MOD_TYPE)
|
|
OSMO_STRBUF_PRINTF(sb, " mod=%s", mod_names[bi->bt]);
|
|
|
|
/* Training Sequence Code */
|
|
if (bi->flags & TRX_BI_F_TS_INFO)
|
|
OSMO_STRBUF_PRINTF(sb, " set=%u tsc=%u", bi->tsc_set, bi->tsc);
|
|
|
|
/* Burst length */
|
|
OSMO_STRBUF_PRINTF(sb, " burst_len=%zu", bi->burst_len);
|
|
|
|
return buf;
|
|
}
|
|
|
|
/* Parse TRXD message from transceiver, compose an UL burst indication.
|
|
*
|
|
* This message contains a demodulated Uplink burst with fixed-size
|
|
* header preceding the burst bits. The header consists of the common
|
|
* and message specific part.
|
|
*
|
|
* +---------------+-----------------+------------+
|
|
* | common header | specific header | burst bits |
|
|
* +---------------+-----------------+------------+
|
|
*
|
|
* Common header is the same as for Downlink message:
|
|
*
|
|
* +-----------------+----------------+-------------------+
|
|
* | VER (1/2 octet) | TN (1/2 octet) | FN (4 octets, BE) |
|
|
* +-----------------+----------------+-------------------+
|
|
*
|
|
* and among with TDMA parameters, contains the version indicator:
|
|
*
|
|
* +-----------------+------------------------+
|
|
* | 7 6 5 4 3 2 1 0 | bit numbers |
|
|
* +-----------------+------------------------+
|
|
* | X X X X . . . . | PDU version (0..15) |
|
|
* +-----------------+------------------------+
|
|
* | . . . . . X X X | TDMA TN (0..7) |
|
|
* +-----------------+------------------------+
|
|
* | . . . . X . . . | RESERVED (0) |
|
|
* +-----------------+------------------------+
|
|
*
|
|
* which is encoded in 4 MSB bits of the first octet, which used to be
|
|
* zero-initialized due to the value range of TDMA TN. Therefore, the
|
|
* old header format has implicit version 0x00.
|
|
*
|
|
* The message specific header has the following structure:
|
|
*
|
|
* == Version 0x00
|
|
*
|
|
* +------+-----+--------------------+
|
|
* | RSSI | ToA | soft-bits (254..0) |
|
|
* +------+-----+--------------------+
|
|
*
|
|
* == Version 0x01
|
|
*
|
|
* +------+-----+-----+-----+--------------------+
|
|
* | RSSI | ToA | MTS | C/I | soft-bits (254..0) |
|
|
* +------+-----+-----+-----+--------------------+
|
|
*
|
|
* where:
|
|
*
|
|
* - RSSI (1 octet) - Received Signal Strength Indication
|
|
* encoded without the negative sign.
|
|
* - ToA (2 octets) - Timing of Arrival in units of 1/256
|
|
* of symbol (big endian).
|
|
* - MTS (1 octet) - Modulation and Training Sequence info.
|
|
* - C/I (2 octets) - Carrier-to-Interference ratio (big endian).
|
|
*
|
|
* == Coding of MTS: Modulation and Training Sequence info
|
|
*
|
|
* 3GPP TS 45.002 version 15.1.0 defines several modulation types,
|
|
* and a few sets of training sequences for each type. The most
|
|
* common are GMSK and 8-PSK (which is used in EDGE).
|
|
*
|
|
* +-----------------+---------------------------------------+
|
|
* | 7 6 5 4 3 2 1 0 | bit numbers (value range) |
|
|
* +-----------------+---------------------------------------+
|
|
* | . . . . . X X X | Training Sequence Code (0..7) |
|
|
* +-----------------+---------------------------------------+
|
|
* | . X X X X . . . | Modulation, TS set number (see below) |
|
|
* +-----------------+---------------------------------------+
|
|
* | X . . . . . . . | IDLE / nope frame indication (0 or 1) |
|
|
* +-----------------+---------------------------------------+
|
|
*
|
|
* The bit number 7 (MSB) is set to high when either nothing has been
|
|
* detected, or during IDLE frames, so we can deliver noise levels,
|
|
* and avoid clock gaps on the L1 side. Other bits are ignored,
|
|
* and should be set to low (0) in this case. L16 shall be set to 0x00.
|
|
*
|
|
* == Coding of modulation and TS set number
|
|
*
|
|
* GMSK has 4 sets of training sequences (see tables 5.2.3a-d),
|
|
* while 8-PSK (see tables 5.2.3f-g) and the others have 2 sets.
|
|
* Access and Synchronization bursts also have several synch.
|
|
* sequences.
|
|
*
|
|
* +-----------------+---------------------------------------+
|
|
* | 7 6 5 4 3 2 1 0 | bit numbers (value range) |
|
|
* +-----------------+---------------------------------------+
|
|
* | . 0 0 X X . . . | GMSK, 4 TS sets (0..3) |
|
|
* +-----------------+---------------------------------------+
|
|
* | . 0 1 0 X . . . | 8-PSK, 2 TS sets (0..1) |
|
|
* +-----------------+---------------------------------------+
|
|
* | . 0 1 1 X . . . | AQPSK, 2 TS sets (0..1) |
|
|
* +-----------------+---------------------------------------+
|
|
* | . 1 0 0 X . . . | 16QAM, 2 TS sets (0..1) |
|
|
* +-----------------+---------------------------------------+
|
|
* | . 1 0 1 X . . . | 32QAM, 2 TS sets (0..1) |
|
|
* +-----------------+---------------------------------------+
|
|
* | . 1 1 1 X . . . | RESERVED (0) |
|
|
* +-----------------+---------------------------------------+
|
|
*
|
|
* NOTE: we only support GMSK and 8-PSK.
|
|
*
|
|
* == C/I: Carrier-to-Interference ratio
|
|
*
|
|
* The C/I value can be computed from the training sequence of each
|
|
* burst, where we can compare the "ideal" training sequence with
|
|
* the actual training sequence and then express that in centiBels.
|
|
*
|
|
* == Coding of the burst bits
|
|
*
|
|
* Unlike to be transmitted bursts, the received bursts are designated
|
|
* using the soft-bits notation, so the receiver can indicate its
|
|
* assurance from 0 to -127 that a given bit is 1, and from 0 to +127
|
|
* that a given bit is 0.
|
|
*
|
|
* Each soft-bit (-127..127) of the burst is encoded as an unsigned
|
|
* value in range (254..0) respectively using the constant shift.
|
|
*
|
|
*/
|
|
static int trx_data_read_cb(struct osmo_fd *ofd, unsigned int what)
|
|
{
|
|
struct trx_l1h *l1h = ofd->data;
|
|
uint8_t buf[TRX_DATA_MSG_MAX_LEN];
|
|
struct trx_ul_burst_ind bi;
|
|
ssize_t hdr_len, buf_len;
|
|
uint8_t pdu_ver;
|
|
int rc;
|
|
|
|
buf_len = recv(ofd->fd, buf, sizeof(buf), 0);
|
|
if (buf_len <= 0) {
|
|
strerror_r(errno, (char *)buf, sizeof(buf));
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
|
|
"recv() failed on TRXD with rc=%zd (%s)\n", buf_len, buf);
|
|
return buf_len;
|
|
}
|
|
|
|
/* Pre-clean (initialize) the flags */
|
|
bi.flags = 0x00;
|
|
|
|
/* Parse header depending on the PDU version */
|
|
pdu_ver = buf[0] >> 4;
|
|
switch (pdu_ver) {
|
|
case 0:
|
|
/* Legacy protocol has no version indicator */
|
|
hdr_len = trx_data_handle_hdr_v0(l1h, &bi, buf, buf_len);
|
|
break;
|
|
case 1:
|
|
hdr_len = trx_data_handle_hdr_v1(l1h, &bi, buf, buf_len);
|
|
break;
|
|
default:
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
|
|
"TRXD PDU version %u is not supported\n", pdu_ver);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
/* Header parsing error */
|
|
if (hdr_len < 0)
|
|
return hdr_len;
|
|
|
|
if (bi.flags & TRX_BI_F_NOPE_IND) {
|
|
bi.burst_len = 0;
|
|
goto skip_burst;
|
|
}
|
|
|
|
/* We're done with the header now */
|
|
buf_len -= hdr_len;
|
|
|
|
/* Handle burst bits */
|
|
switch (pdu_ver) {
|
|
case 0:
|
|
rc = trx_data_handle_burst_v0(l1h, &bi, buf + hdr_len, buf_len);
|
|
break;
|
|
case 1:
|
|
rc = trx_data_handle_burst_v1(l1h, &bi, buf + hdr_len, buf_len);
|
|
break;
|
|
default:
|
|
/* Shall not happen, just to make GCC happy */
|
|
OSMO_ASSERT(0);
|
|
}
|
|
|
|
/* Burst parsing error */
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
skip_burst:
|
|
/* Print header & burst info */
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_DEBUG, "Rx %s (pdu_ver=%u): %s\n",
|
|
(bi.flags & TRX_BI_F_NOPE_IND) ? "NOPE.ind" : "UL burst",
|
|
pdu_ver, trx_data_desc_msg(&bi));
|
|
|
|
/* feed received burst into scheduler code */
|
|
trx_sched_route_burst_ind(&bi, &l1h->l1s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! Send burst data for given FN/timeslot to TRX
|
|
* \param[inout] l1h TRX Layer1 handle referring to TX
|
|
* \param[in] br Downlink burst request structure
|
|
* \returns 0 on success; negative on error */
|
|
int trx_if_send_burst(struct trx_l1h *l1h, const struct trx_dl_burst_req *br)
|
|
{
|
|
ssize_t snd_len;
|
|
uint8_t pdu_ver = l1h->config.trxd_pdu_ver_use;
|
|
uint8_t buf[TRX_DATA_MSG_MAX_LEN];
|
|
|
|
if ((br->burst_len != GSM_BURST_LEN) && (br->burst_len != EGPRS_BURST_LEN)) {
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR, "Tx burst length %zu invalid\n",
|
|
br->burst_len);
|
|
return -1;
|
|
}
|
|
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_DEBUG,
|
|
"Tx burst (pdu_ver=%u): tn=%u fn=%u att=%u\n",
|
|
pdu_ver, br->tn, br->fn, br->att);
|
|
|
|
switch (pdu_ver) {
|
|
case 0:
|
|
case 1:
|
|
/* Both versions have the same PDU format */
|
|
break;
|
|
|
|
default:
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
|
|
"Requested TRXD PDU version %u is not supported\n", pdu_ver);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
buf[0] = ((pdu_ver & 0x0f) << 4) | br->tn;
|
|
osmo_store32be(br->fn, buf + 1);
|
|
buf[5] = br->att;
|
|
|
|
/* copy ubits {0,1} */
|
|
memcpy(buf + 6, br->burst, br->burst_len);
|
|
|
|
/* we must be sure that TRX is on */
|
|
if (trx_if_powered(l1h)) {
|
|
snd_len = send(l1h->trx_ofd_data.fd, buf, br->burst_len + 6, 0);
|
|
if (snd_len <= 0) {
|
|
strerror_r(errno, (char *)buf, sizeof(buf));
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
|
|
"send() failed on TRXD with rc=%zd (%s)\n", snd_len, buf);
|
|
return -2;
|
|
}
|
|
} else
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR, "Ignoring TX data, transceiver powered off.\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* open/close
|
|
*/
|
|
|
|
/*! flush (delete) all pending control messages */
|
|
void trx_if_flush(struct trx_l1h *l1h)
|
|
{
|
|
struct trx_ctrl_msg *tcm;
|
|
|
|
/* free ctrl message list */
|
|
while (!llist_empty(&l1h->trx_ctrl_list)) {
|
|
tcm = llist_entry(l1h->trx_ctrl_list.next, struct trx_ctrl_msg,
|
|
list);
|
|
llist_del(&tcm->list);
|
|
talloc_free(tcm);
|
|
}
|
|
talloc_free(l1h->last_acked);
|
|
}
|
|
|
|
/*! close the TRX for given handle (data + control socket) */
|
|
void trx_if_close(struct trx_l1h *l1h)
|
|
{
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE, "Close transceiver\n");
|
|
|
|
trx_if_flush(l1h);
|
|
|
|
/* close sockets */
|
|
trx_udp_close(&l1h->trx_ofd_ctrl);
|
|
trx_udp_close(&l1h->trx_ofd_data);
|
|
}
|
|
|
|
/*! compute UDP port number used for TRX protocol */
|
|
static uint16_t compute_port(struct phy_instance *pinst, int remote, int is_data)
|
|
{
|
|
struct phy_link *plink = pinst->phy_link;
|
|
uint16_t inc = 1;
|
|
|
|
if (is_data)
|
|
inc = 2;
|
|
|
|
if (remote)
|
|
return plink->u.osmotrx.base_port_remote + (pinst->num << 1) + inc;
|
|
else
|
|
return plink->u.osmotrx.base_port_local + (pinst->num << 1) + inc;
|
|
}
|
|
|
|
/*! open a TRX interface. creates control + data sockets */
|
|
static int trx_if_open(struct trx_l1h *l1h)
|
|
{
|
|
struct phy_instance *pinst = l1h->phy_inst;
|
|
struct phy_link *plink = pinst->phy_link;
|
|
int rc;
|
|
|
|
LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE, "Open transceiver\n");
|
|
|
|
/* open sockets */
|
|
rc = trx_udp_open(l1h, &l1h->trx_ofd_ctrl,
|
|
plink->u.osmotrx.local_ip,
|
|
compute_port(pinst, 0, 0),
|
|
plink->u.osmotrx.remote_ip,
|
|
compute_port(pinst, 1, 0), trx_ctrl_read_cb);
|
|
if (rc < 0)
|
|
return rc;
|
|
rc = trx_udp_open(l1h, &l1h->trx_ofd_data,
|
|
plink->u.osmotrx.local_ip,
|
|
compute_port(pinst, 0, 1),
|
|
plink->u.osmotrx.remote_ip,
|
|
compute_port(pinst, 1, 1), trx_data_read_cb);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! close the control + burst data sockets for one phy_instance */
|
|
static void trx_phy_inst_close(struct phy_instance *pinst)
|
|
{
|
|
struct trx_l1h *l1h = pinst->u.osmotrx.hdl;
|
|
|
|
trx_if_close(l1h);
|
|
trx_sched_exit(&l1h->l1s);
|
|
}
|
|
|
|
/*! open the control + burst data sockets for one phy_instance */
|
|
static int trx_phy_inst_open(struct phy_instance *pinst)
|
|
{
|
|
struct trx_l1h *l1h;
|
|
int rc;
|
|
|
|
l1h = pinst->u.osmotrx.hdl;
|
|
if (!l1h)
|
|
return -EINVAL;
|
|
|
|
rc = trx_sched_init(&l1h->l1s, pinst->trx);
|
|
if (rc < 0) {
|
|
LOGPPHI(l1h->phy_inst, DL1C, LOGL_FATAL, "Cannot initialize scheduler\n");
|
|
return -EIO;
|
|
}
|
|
|
|
rc = trx_if_open(l1h);
|
|
if (rc < 0) {
|
|
LOGPPHI(l1h->phy_inst, DL1C, LOGL_FATAL, "Cannot open TRX interface\n");
|
|
trx_phy_inst_close(pinst);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! open the PHY link using TRX protocol */
|
|
int bts_model_phy_link_open(struct phy_link *plink)
|
|
{
|
|
struct phy_instance *pinst;
|
|
int rc;
|
|
|
|
phy_link_state_set(plink, PHY_LINK_CONNECTING);
|
|
|
|
/* open the shared/common clock socket */
|
|
rc = trx_udp_open(plink, &plink->u.osmotrx.trx_ofd_clk,
|
|
plink->u.osmotrx.local_ip,
|
|
plink->u.osmotrx.base_port_local,
|
|
plink->u.osmotrx.remote_ip,
|
|
plink->u.osmotrx.base_port_remote,
|
|
trx_clk_read_cb);
|
|
if (rc < 0) {
|
|
phy_link_state_set(plink, PHY_LINK_SHUTDOWN);
|
|
return -1;
|
|
}
|
|
|
|
/* open the individual instances with their ctrl+data sockets */
|
|
llist_for_each_entry(pinst, &plink->instances, list) {
|
|
struct trx_l1h *l1h = pinst->u.osmotrx.hdl;
|
|
if (trx_phy_inst_open(pinst) < 0)
|
|
goto cleanup;
|
|
osmo_fsm_inst_dispatch(l1h->provision_fi, TRX_PROV_EV_OPEN, NULL);
|
|
}
|
|
|
|
return 0;
|
|
|
|
cleanup:
|
|
phy_link_state_set(plink, PHY_LINK_SHUTDOWN);
|
|
llist_for_each_entry(pinst, &plink->instances, list) {
|
|
if (pinst->u.osmotrx.hdl) {
|
|
trx_if_close(pinst->u.osmotrx.hdl);
|
|
pinst->u.osmotrx.hdl = NULL;
|
|
}
|
|
}
|
|
trx_udp_close(&plink->u.osmotrx.trx_ofd_clk);
|
|
return -1;
|
|
}
|
|
|
|
/*! determine if the TRX for given handle is powered up */
|
|
int trx_if_powered(struct trx_l1h *l1h)
|
|
{
|
|
struct phy_instance *pinst = l1h->phy_inst;
|
|
struct phy_link *plink = pinst->phy_link;
|
|
return plink->u.osmotrx.powered;
|
|
}
|