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osmo-bts/src/osmo-bts-trx/trx_if.c

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/*
* OpenBTS-style TRX interface/protocol handling
*
* This file contains the BTS-side implementation of the OpenBTS-style
* UDP TRX protocol. It manages the clock, control + burst-data UDP
* sockets and their respective protocol encoding/parsing.
*
* Copyright (C) 2013 Andreas Eversberg <jolly@eversberg.eu>
* Copyright (C) 2016-2017 Harald Welte <laforge@gnumonks.org>
* Copyright (C) 2019 Vadim Yanitskiy <axilirator@gmail.com>
* Copyright (C) 2021 sysmocom - s.m.f.c. GmbH <info@sysmocom.de>
*
* All Rights Reserved
*
* 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 <stdio.h>
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netinet/in.h>
#include <osmocom/core/select.h>
#include <osmocom/core/socket.h>
#include <osmocom/core/timer.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/bits.h>
#include <osmocom/core/fsm.h>
#include <osmo-bts/phy_link.h>
#include <osmo-bts/logging.h>
#include <osmo-bts/bts.h>
#include <osmo-bts/scheduler.h>
#include "l1_if.h"
#include "trx_if.h"
#include "trx_provision_fsm.h"
#include "btsconfig.h"
#ifdef HAVE_SYSTEMTAP
/* include the generated probes header and put markers in code */
#include "probes.h"
#define TRACE(probe) probe
#define TRACE_ENABLED(probe) probe ## _ENABLED()
#else
/* Wrap the probe to allow it to be removed when no systemtap available */
#define TRACE(probe)
#define TRACE_ENABLED(probe) (0)
#endif /* HAVE_SYSTEMTAP */
/*
* socket helper functions
*/
/*! convenience wrapper to open socket + fill in osmo_fd */
static int trx_udp_open(void *priv, struct osmo_fd *ofd, const char *host_local,
uint16_t port_local, const char *host_remote, uint16_t port_remote,
int (*cb)(struct osmo_fd *fd, unsigned int what))
{
int rc;
/* Init */
ofd->fd = -1;
ofd->cb = cb;
ofd->data = priv;
/* Listen / Binds + Connect */
rc = osmo_sock_init2_ofd(ofd, AF_UNSPEC, SOCK_DGRAM, IPPROTO_UDP, host_local, port_local,
host_remote, port_remote, OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT);
if (rc < 0)
return rc;
return 0;
}
/* close socket + unregister osmo_fd */
static void trx_udp_close(struct osmo_fd *ofd)
{
if (ofd->fd >= 0) {
osmo_fd_unregister(ofd);
close(ofd->fd);
ofd->fd = -1;
}
}
/*
* TRX clock socket
*/
/* get clock from clock socket */
static int trx_clk_read_cb(struct osmo_fd *ofd, unsigned int what)
{
struct phy_link *plink = ofd->data;
struct phy_instance *pinst = phy_instance_by_num(plink, 0);
char buf[TRXC_MSG_BUF_SIZE];
ssize_t len;
uint32_t fn;
OSMO_ASSERT(pinst);
len = recv(ofd->fd, buf, sizeof(buf) - 1, 0);
if (len <= 0) {
strerror_r(errno, (char *)buf, sizeof(buf));
LOGPPHI(pinst, DTRX, LOGL_ERROR,
"recv() failed on TRXD with rc=%zd (%s)\n", len, buf);
return len;
}
buf[len] = '\0';
if (!!strncmp(buf, "IND CLOCK ", 10)) {
LOGPPHI(pinst, DTRX, LOGL_NOTICE,
"Unknown message on clock port: %s\n", buf);
return 0;
}
if (sscanf(buf, "IND CLOCK %u", &fn) != 1) {
LOGPPHI(pinst, DTRX, LOGL_ERROR, "Unable to parse '%s'\n", buf);
return 0;
}
LOGPPHI(pinst, DTRX, LOGL_INFO, "Clock indication: fn=%u\n", fn);
if (fn >= GSM_TDMA_HYPERFRAME) {
fn %= GSM_TDMA_HYPERFRAME;
LOGPPHI(pinst, DTRX, LOGL_ERROR, "Indicated clock's FN is not "
"wrapping correctly, correcting to fn=%u\n", fn);
}
if (!plink->u.osmotrx.powered) {
LOGPPHI(pinst, DTRX, LOGL_NOTICE, "Ignoring CLOCK IND %u, TRX not yet powered on\n", fn);
return 0;
}
/* inform core TRX clock handling code that a FN has been received */
trx_sched_clock(pinst->trx->bts, fn);
return 0;
}
/*
* TRX ctrl socket
*/
/* send first ctrl message and start timer */
static void trx_ctrl_send(struct trx_l1h *l1h)
{
struct trx_ctrl_msg *tcm;
char buf[TRXC_MSG_BUF_SIZE];
int len;
ssize_t snd_len;
/* get first command */
if (llist_empty(&l1h->trx_ctrl_list))
return;
tcm = llist_entry(l1h->trx_ctrl_list.next, struct trx_ctrl_msg, list);
len = snprintf(buf, sizeof(buf), "CMD %s%s%s", tcm->cmd, tcm->params_len ? " ":"", tcm->params);
OSMO_ASSERT(len < sizeof(buf));
LOGPPHI(l1h->phy_inst, DTRX, LOGL_DEBUG, "Sending control '%s'\n", buf);
/* send command */
snd_len = send(l1h->trx_ofd_ctrl.fd, buf, len+1, 0);
if (snd_len <= 0) {
strerror_r(errno, (char *)buf, sizeof(buf));
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
"send() failed on TRXC with rc=%zd (%s)\n", snd_len, buf);
}
/* start timer */
osmo_timer_schedule(&l1h->trx_ctrl_timer, 2, 0);
}
/* send first ctrl message and start timer */
static void trx_ctrl_timer_cb(void *data)
{
struct trx_l1h *l1h = data;
struct trx_ctrl_msg *tcm = NULL;
/* get first command */
OSMO_ASSERT(!llist_empty(&l1h->trx_ctrl_list));
tcm = llist_entry(l1h->trx_ctrl_list.next, struct trx_ctrl_msg, list);
LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE, "No satisfactory response from transceiver(CMD %s%s%s)\n",
tcm->cmd, tcm->params_len ? " ":"", tcm->params);
trx_ctrl_send(l1h);
}
void trx_if_init(struct trx_l1h *l1h)
{
l1h->trx_ctrl_timer.cb = trx_ctrl_timer_cb;
l1h->trx_ctrl_timer.data = l1h;
/* initialize ctrl queue */
INIT_LLIST_HEAD(&l1h->trx_ctrl_list);
l1h->trx_ofd_ctrl.fd = -1;
l1h->trx_ofd_data.fd = -1;
}
/*! Send a new TRX control command.
* \param[inout] l1h TRX Layer1 handle to which to send command
* \param[in] critical
* \param[in] cb callback function to be called when valid response is
* received. Type of cb depends on type of message.
* \param[in] cmd zero-terminated string containing command
* \param[in] fmt Format string (+ variable list of arguments)
* \returns 0 on success; negative on error
*
* The new command will be added to the end of the control command
* queue.
*/
static int trx_ctrl_cmd_cb(struct trx_l1h *l1h, int critical, void *cb, const char *cmd,
const char *fmt, ...)
{
struct trx_ctrl_msg *tcm;
struct trx_ctrl_msg *prev = NULL;
va_list ap;
/* create message */
tcm = talloc_zero(tall_bts_ctx, struct trx_ctrl_msg);
if (!tcm)
return -ENOMEM;
snprintf(tcm->cmd, sizeof(tcm->cmd)-1, "%s", cmd);
tcm->cmd[sizeof(tcm->cmd)-1] = '\0';
tcm->cmd_len = strlen(tcm->cmd);
if (fmt && fmt[0]) {
va_start(ap, fmt);
vsnprintf(tcm->params, sizeof(tcm->params) - 1, fmt, ap);
va_end(ap);
tcm->params[sizeof(tcm->params)-1] = '\0';
tcm->params_len = strlen(tcm->params);
} else {
tcm->params[0] ='\0';
tcm->params_len = 0;
}
tcm->critical = critical;
tcm->cb = cb;
/* Avoid adding consecutive duplicate messages, eg: two consecutive POWEROFF */
if (!llist_empty(&l1h->trx_ctrl_list))
prev = llist_entry(l1h->trx_ctrl_list.prev, struct trx_ctrl_msg, list);
if (prev != NULL && !strcmp(tcm->cmd, prev->cmd)
&& !strcmp(tcm->params, prev->params)) {
LOGPPHI(l1h->phy_inst, DTRX, LOGL_DEBUG,
"Not sending duplicate command '%s'\n", tcm->cmd);
talloc_free(tcm);
return 0;
}
LOGPPHI(l1h->phy_inst, DTRX, LOGL_INFO, "Enqueuing TRX control command 'CMD %s%s%s'\n",
tcm->cmd, tcm->params_len ? " " : "", tcm->params);
llist_add_tail(&tcm->list, &l1h->trx_ctrl_list);
/* send message, if we didn't already have pending messages */
if (prev == NULL)
trx_ctrl_send(l1h);
return 0;
}
#define trx_ctrl_cmd(l1h, critical, cmd, fmt, ...) trx_ctrl_cmd_cb(l1h, critical, NULL, cmd, fmt, ##__VA_ARGS__)
/*! Send "POWEROFF" command to TRX */
int trx_if_cmd_poweroff(struct trx_l1h *l1h, trx_if_cmd_poweronoff_cb *cb)
{
return trx_ctrl_cmd_cb(l1h, 1, cb, "POWEROFF", "");
}
/*! Send "POWERON" command to TRX */
int trx_if_cmd_poweron(struct trx_l1h *l1h, trx_if_cmd_poweronoff_cb *cb)
{
return trx_ctrl_cmd_cb(l1h, 1, cb, "POWERON", "");
}
/*! Send "SETFORMAT" command to TRX: change TRXD PDU version */
int trx_if_cmd_setformat(struct trx_l1h *l1h, uint8_t ver, trx_if_cmd_generic_cb *cb)
{
LOGPPHI(l1h->phy_inst, DTRX, LOGL_INFO,
"Requesting TRXD PDU version %u\n", ver);
return trx_ctrl_cmd_cb(l1h, 0, cb, "SETFORMAT", "%u", ver);
}
/*! Send "SETTSC" command to TRX */
int trx_if_cmd_settsc(struct trx_l1h *l1h, uint8_t tsc, trx_if_cmd_generic_cb *cb)
{
return trx_ctrl_cmd_cb(l1h, 1, cb, "SETTSC", "%d", tsc);
}
/*! Send "SETBSIC" command to TRX */
int trx_if_cmd_setbsic(struct trx_l1h *l1h, uint8_t bsic, trx_if_cmd_generic_cb *cb)
{
return trx_ctrl_cmd_cb(l1h, 1, cb, "SETBSIC", "%d", bsic);
}
/*! Send "SETRXGAIN" command to TRX */
int trx_if_cmd_setrxgain(struct trx_l1h *l1h, int db)
{
return trx_ctrl_cmd(l1h, 0, "SETRXGAIN", "%d", db);
}
/*! Send "NOMTXPOWER" command to TRX */
int trx_if_cmd_getnompower(struct trx_l1h *l1h, trx_if_cmd_getnompower_cb *cb)
{
return trx_ctrl_cmd_cb(l1h, 1, cb, "NOMTXPOWER", "");
}
/*! Send "SETPOWER" command to TRX */
int trx_if_cmd_setpower_att(struct trx_l1h *l1h, int power_att_db, trx_if_cmd_setpower_att_cb *cb)
{
return trx_ctrl_cmd_cb(l1h, 0, cb, "SETPOWER", "%d", power_att_db);
}
/*! Send "SETMAXDLY" command to TRX, i.e. maximum delay for RACH bursts */
int trx_if_cmd_setmaxdly(struct trx_l1h *l1h, int dly)
{
return trx_ctrl_cmd(l1h, 0, "SETMAXDLY", "%d", dly);
}
/*! Send "SETMAXDLYNB" command to TRX, i.e. maximum delay for normal bursts */
int trx_if_cmd_setmaxdlynb(struct trx_l1h *l1h, int dly)
{
return trx_ctrl_cmd(l1h, 0, "SETMAXDLYNB", "%d", dly);
}
/*! Send "SETSLOT" command to TRX: Configure Channel Combination and TSC for TS */
int trx_if_cmd_setslot(struct trx_l1h *l1h, uint8_t tn,
trx_if_cmd_setslot_cb *cb)
{
const struct trx_config *cfg = &l1h->config;
const struct phy_instance *pinst = l1h->phy_inst;
if (cfg->setslot[tn].tsc_valid && cfg->setslot[tn].tsc_val != BTS_TSC(pinst->trx->bts)) {
/* PHY is instructed to use a custom TSC */
return trx_ctrl_cmd_cb(l1h, 1, cb, "SETSLOT", "%u %u C%u/S%u",
tn, cfg->setslot[tn].slottype,
cfg->setslot[tn].tsc_val,
cfg->setslot[tn].tsc_set);
} else { /* PHY is instructed to use the default TSC from 'SETTSC' */
return trx_ctrl_cmd_cb(l1h, 1, cb, "SETSLOT", "%u %u",
tn, cfg->setslot[tn].slottype);
}
}
/*! Send "RXTUNE" command to TRX: Tune Receiver to given ARFCN */
int trx_if_cmd_rxtune(struct trx_l1h *l1h, uint16_t arfcn, trx_if_cmd_generic_cb *cb)
{
struct phy_instance *pinst = l1h->phy_inst;
uint16_t freq10;
if (pinst->trx->bts->band == GSM_BAND_1900)
arfcn |= ARFCN_PCS;
freq10 = gsm_arfcn2freq10(arfcn, 1); /* RX = uplink */
if (freq10 == 0xffff) {
LOGPPHI(pinst, DTRX, LOGL_ERROR, "Arfcn %d not defined.\n",
arfcn & ~ARFCN_FLAG_MASK);
return -ENOTSUP;
}
return trx_ctrl_cmd_cb(l1h, 1, cb, "RXTUNE", "%d", freq10 * 100);
}
/*! Send "TXTUNE" command to TRX: Tune Transmitter to given ARFCN */
int trx_if_cmd_txtune(struct trx_l1h *l1h, uint16_t arfcn, trx_if_cmd_generic_cb *cb)
{
struct phy_instance *pinst = l1h->phy_inst;
uint16_t freq10;
if (pinst->trx->bts->band == GSM_BAND_1900)
arfcn |= ARFCN_PCS;
freq10 = gsm_arfcn2freq10(arfcn, 0); /* TX = downlink */
if (freq10 == 0xffff) {
LOGPPHI(pinst, DTRX, LOGL_ERROR, "Arfcn %d not defined.\n",
arfcn & ~ARFCN_FLAG_MASK);
return -ENOTSUP;
}
return trx_ctrl_cmd_cb(l1h, 1, cb, "TXTUNE", "%d", freq10 * 100);
}
/*! Send "HANDOVER" command to TRX: Enable handover RACH Detection on timeslot/sub-slot */
int trx_if_cmd_handover(struct trx_l1h *l1h, uint8_t tn, uint8_t ss)
{
return trx_ctrl_cmd(l1h, 1, "HANDOVER", "%d %d", tn, ss);
}
/*! Send "NOHANDOVER" command to TRX: Disable handover RACH Detection on timeslot/sub-slot */
int trx_if_cmd_nohandover(struct trx_l1h *l1h, uint8_t tn, uint8_t ss)
{
return trx_ctrl_cmd(l1h, 1, "NOHANDOVER", "%d %d", tn, ss);
}
/*! Send "RFMUTE" command to TRX: Mute or Unmute RF transmission */
int trx_if_cmd_rfmute(struct trx_l1h *l1h, bool mute)
{
return trx_ctrl_cmd(l1h, 0, "RFMUTE", mute ? "1" : "0");
}
struct trx_ctrl_rsp {
char cmd[50];
char params[100];
int status;
void *cb;
};
static int parse_rsp(const char *buf_in, size_t len_in, struct trx_ctrl_rsp *rsp)
{
size_t nlen, plen;
char *p, *k;
if (strncmp(buf_in, "RSP ", 4))
goto parse_err;
/* Get the RSP cmd name */
if (!(p = strchr(buf_in + 4, ' ')))
goto parse_err;
/* Calculate length of the name part */
nlen = p - (buf_in + 4);
if (nlen >= sizeof(rsp->cmd)) {
LOGP(DTRX, LOGL_ERROR, "TRXC command name part is too long: "
"%zu >= %zu\n", nlen, sizeof(rsp->cmd));
goto parse_err;
}
memcpy(&rsp->cmd[0], buf_in + 4, nlen);
rsp->cmd[nlen] = '\0';
/* Now comes the status code of the response */
p++;
if (sscanf(p, "%d", &rsp->status) != 1)
goto parse_err;
/* Now copy back the parameters */
k = strchr(p, ' ');
if (k)
k++;
else
k = p + strlen(p);
/* Calculate length of the parameters part */
plen = strlen(k);
if (plen >= sizeof(rsp->params)) {
LOGP(DTRX, LOGL_ERROR, "TRXC command parameters part is too long: "
"%zu >= %zu\n", plen, sizeof(rsp->params));
goto parse_err;
}
memcpy(&rsp->params[0], k, plen);
rsp->params[plen] = '\0';
return 0;
parse_err:
LOGP(DTRX, LOGL_NOTICE, "Unknown TRXC message: %s\n", buf_in);
return -1;
}
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[TRXC_MSG_BUF_SIZE];
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;
/* Remove command from list, save it to last_acked and remove previous
* last_acked. Do it before calling callback to avoid user freeing tcm
* pointer if flushing/closing the iface. */
llist_del(&tcm->list);
talloc_free(l1h->last_acked);
l1h->last_acked = tcm;
/* 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) {
if (!llist_empty(&l1h->trx_ctrl_list))
osmo_timer_schedule(&l1h->trx_ctrl_timer, rc, 0);
return 0;
}
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
*/
/* Uplink TRXDv0 header length: TDMA TN + FN + RSSI + ToA256 */
#define TRX_UL_V0HDR_LEN (1 + 4 + 1 + 2)
/* Uplink TRXDv1 header length: additional MTS + C/I */
#define TRX_UL_V1HDR_LEN (TRX_UL_V0HDR_LEN + 1 + 2)
/* Uplink TRXDv2 header length: TDMA TN + TRXN + MTS + RSSI + ToA256 + C/I */
#define TRX_UL_V2HDR_LEN (1 + 1 + 1 + 1 + 2 + 2)
/* Minimum Uplink TRXD header length for all PDU versions */
static const uint8_t trx_data_rx_hdr_len[] = {
TRX_UL_V0HDR_LEN, /* TRXDv0 */
TRX_UL_V1HDR_LEN, /* TRXDv1 */
TRX_UL_V2HDR_LEN, /* TRXDv2 */
};
static const uint8_t trx_data_mod_val[] = {
[TRX_MOD_T_GMSK] = 0x00, /* .00xx... */
[TRX_MOD_T_8PSK] = 0x20, /* .010x... */
[TRX_MOD_T_AQPSK] = 0x60, /* .11xx... */
};
/* Header dissector for TRXDv0 (and part of TRXDv1) */
static inline void trx_data_handle_hdr_v0_part(struct trx_ul_burst_ind *bi,
const uint8_t *buf)
{
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);
}
/* TRXD header dissector for version 0x00 */
static int trx_data_handle_hdr_v0(struct phy_instance *phy_inst,
struct trx_ul_burst_ind *bi,
const uint8_t *buf, size_t buf_len)
{
/* Parse TRXDv0 specific header part */
trx_data_handle_hdr_v0_part(bi, buf);
buf_len -= TRX_UL_V0HDR_LEN;
/* Guess modulation and burst length by the rest octets.
* NOTE: a legacy transceiver may append two garbage bytes. */
switch (buf_len) {
case EGPRS_BURST_LEN + 2:
case EGPRS_BURST_LEN:
bi->mod = TRX_MOD_T_8PSK;
break;
case GSM_BURST_LEN + 2:
case GSM_BURST_LEN:
bi->mod = TRX_MOD_T_GMSK;
break;
default:
LOGPPHI(phy_inst, DTRX, LOGL_NOTICE,
"Rx TRXD PDU with odd burst length %zu\n", buf_len);
return -EINVAL;
}
return TRX_UL_V0HDR_LEN;
}
/* Parser for MTS (Modulation and Training Sequence) */
static inline int trx_data_parse_mts(struct phy_instance *phy_inst,
struct trx_ul_burst_ind *bi,
const uint8_t mts)
{
if (mts & (1 << 7)) {
bi->flags |= TRX_BI_F_NOPE_IND;
return 0;
}
/* | 7 6 5 4 3 2 1 0 | Bitmask / description
* | . 0 0 X X . . . | GMSK, 4 TSC sets (0..3)
* | . 0 1 0 X . . . | 8-PSK, 2 TSC sets (0..1) */
if ((mts >> 5) == 0x00) {
bi->mod = TRX_MOD_T_GMSK;
bi->tsc_set = (mts >> 3) & 0x03;
} else if ((mts >> 4) == 0x02) {
bi->mod = TRX_MOD_T_8PSK;
bi->tsc_set = (mts >> 3) & 0x01;
} else {
LOGPPHI(phy_inst, DTRX, LOGL_ERROR,
"Rx TRXD PDU with unknown or not supported "
"modulation (MTS=0x%02x)\n", mts);
return -ENOTSUP;
}
/* Training Sequence Code */
bi->tsc = mts & 0x07;
bi->flags |= (TRX_BI_F_MOD_TYPE | TRX_BI_F_TS_INFO);
return 0;
}
/* TRXD header dissector for version 0x01 */
static int trx_data_handle_hdr_v1(struct phy_instance *phy_inst,
struct trx_ul_burst_ind *bi,
const uint8_t *buf, size_t buf_len)
{
int rc;
/* Parse TRXDv0 specific header part */
trx_data_handle_hdr_v0_part(bi, buf);
buf += TRX_UL_V0HDR_LEN;
/* MTS (Modulation and Training Sequence) */
rc = trx_data_parse_mts(phy_inst, bi, buf[0]);
if (rc < 0)
return rc;
/* 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 header dissector for version 0x01 */
static int trx_data_handle_pdu_v2(struct phy_instance *phy_inst,
struct trx_ul_burst_ind *bi,
const uint8_t *buf, size_t buf_len)
{
int rc;
/* TDMA timeslot number (other bits are RFU) */
bi->tn = buf[0] & 0x07;
if (buf[1] & (1 << 7)) /* BATCH.ind */
bi->flags |= TRX_BI_F_BATCH_IND;
if (buf[1] & (1 << 6)) /* VAMOS.ind */
bi->flags |= TRX_BI_F_SHADOW_IND;
/* TRX (RF channel) number */
bi->trx_num = buf[1] & 0x3f;
bi->flags |= TRX_BI_F_TRX_NUM;
/* MTS (Modulation and Training Sequence) */
rc = trx_data_parse_mts(phy_inst, bi, buf[2]);
if (rc < 0)
return rc;
bi->rssi = -(int8_t)buf[3];
bi->toa256 = (int16_t) osmo_load16be(&buf[4]);
bi->ci_cb = (int16_t) osmo_load16be(&buf[6]);
bi->flags |= TRX_BI_F_CI_CB;
/* TDMA frame number is absent in batched PDUs */
if (bi->_num_pdus == 0) {
if (buf_len < sizeof(bi->fn) + TRX_UL_V2HDR_LEN) {
LOGPPHI(phy_inst, DTRX, LOGL_ERROR,
"Rx malformed TRXDv2 PDU: not enough bytes "
"to parse TDMA frame number\n");
return -EINVAL;
}
bi->fn = osmo_load32be(buf + TRX_UL_V2HDR_LEN);
return TRX_UL_V2HDR_LEN + sizeof(bi->fn);
}
return TRX_UL_V2HDR_LEN;
}
/* TRXD burst handler (version independent) */
static int trx_data_handle_burst(struct trx_ul_burst_ind *bi,
const uint8_t *buf, size_t buf_len)
{
size_t i;
/* NOPE.ind contains no burst */
if (bi->flags & TRX_BI_F_NOPE_IND) {
bi->burst_len = 0;
return 0;
}
/* Modulation types defined in 3GPP TS 45.002 */
static const size_t bl[] = {
[TRX_MOD_T_GMSK] = 148, /* 1 bit per symbol */
[TRX_MOD_T_8PSK] = 444, /* 3 bits per symbol */
};
bi->burst_len = bl[bi->mod];
if (buf_len < bi->burst_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;
}
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_MOD_T_GMSK] = "GMSK",
[TRX_MOD_T_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);
/* TRX (RF channel number) */
if (bi->flags & TRX_BI_F_TRX_NUM)
OSMO_STRBUF_PRINTF(sb, " trx_num=%u", bi->trx_num);
/* 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->mod]);
/* 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;
}
/* TRXD buffer used by Rx/Tx handlers */
static uint8_t trx_data_buf[TRXD_MSG_BUF_SIZE];
/* Parse TRXD message from transceiver, compose an UL burst indication. */
static int trx_data_read_cb(struct osmo_fd *ofd, unsigned int what)
{
const uint8_t *buf = &trx_data_buf[0];
struct trx_l1h *l1h = ofd->data;
struct trx_ul_burst_ind bi;
ssize_t hdr_len, buf_len;
uint8_t pdu_ver;
buf_len = recv(ofd->fd, trx_data_buf, sizeof(trx_data_buf), 0);
if (buf_len <= 0) {
strerror_r(errno, (char *) trx_data_buf, sizeof(trx_data_buf));
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
"recv() failed on TRXD with rc=%zd (%s)\n",
buf_len, trx_data_buf);
return buf_len;
}
/* Parse PDU version first */
pdu_ver = buf[0] >> 4;
/* Make sure that PDU version matches our expectations */
if (pdu_ver != l1h->config.trxd_pdu_ver_use) {
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
"Rx TRXD PDU with unexpected version %u (expected %u)\n",
pdu_ver, l1h->config.trxd_pdu_ver_use);
return -EIO;
}
/* We're about to parse the first PDU */
bi._num_pdus = 0;
/* Starting from TRXDv2, there can be batched PDUs */
do {
/* (Re)initialize the flags */
bi.flags = 0x00;
/* Make sure that we have enough bytes to parse the header */
if (buf_len < trx_data_rx_hdr_len[pdu_ver]) {
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
"Rx malformed TRXDv%u PDU: len=%zd < expected %u\n",
pdu_ver, buf_len, trx_data_rx_hdr_len[pdu_ver]);
return -EINVAL;
}
/* Parse header depending on the PDU version */
switch (pdu_ver) {
case 0: /* TRXDv0 */
hdr_len = trx_data_handle_hdr_v0(l1h->phy_inst, &bi, buf, buf_len);
break;
case 1: /* TRXDv1 */
hdr_len = trx_data_handle_hdr_v1(l1h->phy_inst, &bi, buf, buf_len);
break;
case 2: /* TRXDv2 */
hdr_len = trx_data_handle_pdu_v2(l1h->phy_inst, &bi, buf, buf_len);
break;
default:
/* Shall not happen */
OSMO_ASSERT(0);
}
/* Header parsing error */
if (hdr_len < 0)
return hdr_len;
if (bi.fn >= GSM_TDMA_HYPERFRAME) {
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
"Rx malformed TRXDv%u PDU: illegal TDMA fn=%u\n",
pdu_ver, bi.fn);
return -EINVAL;
}
/* We're done with the header now */
buf_len -= hdr_len;
buf += hdr_len;
/* Calculate burst length and parse it (if present) */
if (trx_data_handle_burst(&bi, buf, buf_len) != 0) {
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
"Rx malformed TRXDv%u PDU: odd burst length=%zd\n",
pdu_ver, buf_len);
return -EINVAL;
}
/* We're done with the burst bits now */
buf_len -= bi.burst_len;
buf += bi.burst_len;
/* 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));
/* Number of processed PDUs */
bi._num_pdus++;
/* feed received burst into scheduler code */
TRACE(OSMO_BTS_TRX_UL_DATA_START(l1h->phy_inst->trx->nr, bi.tn, bi.fn));
trx_sched_route_burst_ind(l1h->phy_inst->trx, &bi);
TRACE(OSMO_BTS_TRX_UL_DATA_DONE(l1h->phy_inst->trx->nr, bi.tn, bi.fn));
} while (bi.flags & TRX_BI_F_BATCH_IND);
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)
{
uint8_t pdu_ver = l1h->config.trxd_pdu_ver_use;
static uint8_t *buf = &trx_data_buf[0];
static uint8_t *last_pdu = NULL;
static unsigned int pdu_num = 0;
ssize_t snd_len, buf_len;
/* Make sure that the PHY is powered on */
if (!trx_if_powered(l1h)) {
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
"Ignoring Tx data, transceiver is powered off\n");
return -ENODEV;
}
/* Burst batching breaker */
if (br == NULL) {
if (pdu_num > 0)
goto sendall;
return -ENOMSG;
}
/* Pointer to the last encoded PDU */
last_pdu = &buf[0];
switch (pdu_ver) {
/* Both versions have the same PDU format */
case 0: /* TRXDv0 */
case 1: /* TRXDv1 */
buf[0] = ((pdu_ver & 0x0f) << 4) | br->tn;
osmo_store32be(br->fn, buf + 1);
buf[5] = br->att;
buf += 6;
break;
case 2: /* TRXDv2 */
buf[0] = br->tn;
/* BATCH.ind will be unset in the last PDU */
buf[1] = (br->trx_num & 0x3f) | (1 << 7);
buf[2] = trx_data_mod_val[br->mod]
| (br->tsc_set << 3)
| (br->tsc & 0x07);
buf[3] = br->att;
buf[4] = (uint8_t) br->scpir;
buf[5] = buf[6] = buf[7] = 0x00; /* Spare */
/* Some fields are not present in batched PDUs */
if (pdu_num == 0) {
buf[0] |= (pdu_ver & 0x0f) << 4;
osmo_store32be(br->fn, buf + 8);
buf += 4;
}
buf += 8;
break;
default:
/* Shall not happen */
OSMO_ASSERT(0);
}
/* copy ubits {0,1} */
memcpy(buf, br->burst, br->burst_len);
buf += br->burst_len;
/* One more PDU in the buffer */
pdu_num++;
/* TRXDv2: wait for the batching breaker */
if (pdu_ver >= 2)
return 0;
sendall:
LOGPPHI(l1h->phy_inst, DTRX, LOGL_DEBUG,
"Tx TRXDv%u datagram with %u PDU(s)\n",
pdu_ver, pdu_num);
/* TRXDv2: unset BATCH.ind in the last PDU */
if (pdu_ver >= 2)
last_pdu[1] &= ~(1 << 7);
buf_len = buf - &trx_data_buf[0];
buf = &trx_data_buf[0];
pdu_num = 0;
snd_len = send(l1h->trx_ofd_data.fd, trx_data_buf, buf_len, 0);
if (snd_len <= 0) {
strerror_r(errno, (char *) trx_data_buf, sizeof(trx_data_buf));
LOGPPHI(l1h->phy_inst, DTRX, LOGL_ERROR,
"send() failed on TRXD with rc=%zd (%s)\n",
snd_len, trx_data_buf);
return -2;
}
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);
l1h->last_acked = NULL;
/* Tx queue is now empty, so there's no point in keeping the retrans timer armed: */
if (osmo_timer_pending(&l1h->trx_ctrl_timer))
osmo_timer_del(&l1h->trx_ctrl_timer);
}
/*! close the TRX for given handle (data + control socket) */
void trx_if_close(struct trx_l1h *l1h)
{
LOGPPHI(l1h->phy_inst, DTRX, LOGL_NOTICE, "Closing TRXC/TRXD connections\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(pinst, DTRX, LOGL_NOTICE, "Opening TRXC/TRXD connections\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);
if (pinst->trx)
trx_sched_clean(pinst->trx);
}
/*! 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;
/* PHY instance may be not associated with a TRX instance */
if (pinst->trx != NULL)
trx_sched_init(pinst->trx);
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;
}
/*! close the PHY link using TRX protocol */
int bts_model_phy_link_close(struct phy_link *plink)
{
bool clock_stopped = false;
struct phy_instance *pinst;
llist_for_each_entry(pinst, &plink->instances, list) {
if (!clock_stopped) {
clock_stopped = true;
trx_sched_clock_stopped(pinst->trx->bts);
}
trx_phy_inst_close(pinst);
}
trx_udp_close(&plink->u.osmotrx.trx_ofd_clk);
phy_link_state_set(plink, PHY_LINK_SHUTDOWN);
return 0;
}
/*! 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;
}
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