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/* Osmocom OsmoBTS specific code */
/* (C) 2010-2012 by Harald Welte <laforge@gnumonks.org>
* (C) 2021 by sysmocom - s.f.m.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 <arpa/inet.h>
#include <osmocom/gsm/tlv.h>
#include <osmocom/bsc/gsm_data.h>
#include <osmocom/bsc/signal.h>
#include <osmocom/bsc/abis_nm.h>
#include <osmocom/bsc/bts.h>
#include <osmocom/abis/e1_input.h>
#include <osmocom/gsm/tlv.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/talloc.h>
#include <osmocom/bsc/gsm_data.h>
#include <osmocom/bsc/abis_nm.h>
#include <osmocom/bsc/abis_rsl.h>
#include <osmocom/bsc/debug.h>
#include <osmocom/abis/subchan_demux.h>
#include <osmocom/abis/ipaccess.h>
#include <osmocom/core/logging.h>
extern struct gsm_bts_model bts_model_nanobts;
static struct gsm_bts_model model_osmobts;
static void enc_osmo_meas_proc_params(struct msgb *msg, const struct gsm_power_ctrl_params *mp)
{
struct osmo_preproc_ave_cfg *ave_cfg;
uint8_t *ie_len;
/* No averaging => no Measurement Averaging parameters */
if (mp->ci_fr_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE &&
mp->ci_hr_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE &&
mp->ci_amr_fr_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE &&
mp->ci_amr_hr_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE &&
mp->ci_sdcch_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE &&
mp->ci_gprs_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE)
return;
/* (TLV) Measurement Averaging parameters for RxLev/RxQual */
ie_len = msgb_tl_put(msg, RSL_IPAC_EIE_OSMO_MEAS_AVG_CFG);
ave_cfg = (struct osmo_preproc_ave_cfg *) msgb_put(msg, sizeof(*ave_cfg));
#define ENC_PROC(PARAMS, TO, TYPE) do { \
(TO)->TYPE.ave_enabled = (PARAMS)->TYPE##_meas.algo != GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE; \
if ((TO)->TYPE.ave_enabled) { \
/* H_REQAVE and H_REQT */ \
(TO)->TYPE.h_reqave = (PARAMS)->TYPE##_meas.h_reqave & 0x1f; \
(TO)->TYPE.h_reqt = (PARAMS)->TYPE##_meas.h_reqt & 0x1f; \
/* Averaging method and parameters */ \
(TO)->TYPE.ave_method = ((PARAMS)->TYPE##_meas.algo - 1) & 0x07; \
switch ((PARAMS)->TYPE##_meas.algo) { \
case GSM_PWR_CTRL_MEAS_AVG_ALGO_OSMO_EWMA: \
msgb_v_put(msg, (PARAMS)->TYPE##_meas.ewma.alpha); \
break; \
case GSM_PWR_CTRL_MEAS_AVG_ALGO_WEIGHTED: \
case GSM_PWR_CTRL_MEAS_AVG_ALGO_MOD_MEDIAN: \
/* FIXME: unknown format */ \
break; \
case GSM_PWR_CTRL_MEAS_AVG_ALGO_UNWEIGHTED: \
case GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE: \
/* No parameters here */ \
break; \
} \
} \
} while (0)
ENC_PROC(mp, ave_cfg, ci_fr);
ENC_PROC(mp, ave_cfg, ci_hr);
ENC_PROC(mp, ave_cfg, ci_amr_fr);
ENC_PROC(mp, ave_cfg, ci_amr_hr);
ENC_PROC(mp, ave_cfg, ci_sdcch);
ENC_PROC(mp, ave_cfg, ci_gprs);
#undef ENC_PROC
/* Update length part of the containing IE */
*ie_len = msg->tail - (ie_len + 1);
}
/* Appends Osmocom specific extension IEs into RSL_IE_MS_POWER_PARAM */
void osmobts_enc_power_params_osmo_ext(struct msgb *msg, const struct gsm_power_ctrl_params *cp)
{
struct osmo_preproc_pc_thresh *osmo_thresh;
struct osmo_preproc_pc_comp *osmo_thresh_comp;
uint8_t *ie_len;
/* (TLV) Measurement Averaging Configure (C/I) */
enc_osmo_meas_proc_params(msg, cp);
/* (TLV) Thresholds (C/I) */
ie_len = msgb_tl_put(msg, RSL_IPAC_EIE_OSMO_MS_PWR_CTL);
osmo_thresh = (struct osmo_preproc_pc_thresh *) msgb_put(msg, sizeof(*osmo_thresh));
#define ENC_THRESH_CI(TYPE) \
do { \
if (cp->TYPE##_meas.enabled) { \
osmo_thresh->l_##TYPE = cp->TYPE##_meas.lower_thresh; \
osmo_thresh->u_##TYPE = cp->TYPE##_meas.upper_thresh; \
} else { \
osmo_thresh->l_##TYPE = 0; \
osmo_thresh->u_##TYPE = 0; \
} \
} while (0)
ENC_THRESH_CI(ci_fr);
ENC_THRESH_CI(ci_hr);
ENC_THRESH_CI(ci_amr_fr);
ENC_THRESH_CI(ci_amr_hr);
ENC_THRESH_CI(ci_sdcch);
ENC_THRESH_CI(ci_gprs);
#undef ENC_THRESH_CI
/* Update length part of the containing IE */
*ie_len = msg->tail - (ie_len + 1);
/* (TLV) PC Threshold Comparators (C/I) */
ie_len = msgb_tl_put(msg, RSL_IPAC_EIE_OSMO_PC_THRESH_COMP);
osmo_thresh_comp = (struct osmo_preproc_pc_comp *) msgb_put(msg, sizeof(*osmo_thresh_comp));
#define ENC_THRESH_CI(TYPE) \
do { \
if (cp->TYPE##_meas.enabled) { \
osmo_thresh_comp->TYPE.lower_p = cp->TYPE##_meas.lower_cmp_p & 0x1f; \
osmo_thresh_comp->TYPE.lower_n = cp->TYPE##_meas.lower_cmp_n & 0x1f; \
osmo_thresh_comp->TYPE.upper_p = cp->TYPE##_meas.upper_cmp_p & 0x1f; \
osmo_thresh_comp->TYPE.upper_n = cp->TYPE##_meas.upper_cmp_n & 0x1f; \
} else { \
osmo_thresh_comp->TYPE.lower_p = 0; \
osmo_thresh_comp->TYPE.lower_n = 0; \
osmo_thresh_comp->TYPE.upper_p = 0; \
osmo_thresh_comp->TYPE.upper_n = 0; \
} \
} while (0)
ENC_THRESH_CI(ci_fr);
ENC_THRESH_CI(ci_hr);
ENC_THRESH_CI(ci_amr_fr);
ENC_THRESH_CI(ci_amr_hr);
ENC_THRESH_CI(ci_sdcch);
ENC_THRESH_CI(ci_gprs);
#undef ENC_THRESH_CI
/* Update length part of the containing IE */
*ie_len = msg->tail - (ie_len + 1);
}
static int power_ctrl_send_c0_power_red(const struct gsm_bts *bts, const uint8_t red)
{
struct abis_rsl_dchan_hdr *dh;
struct msgb *msg;
msg = rsl_msgb_alloc();
if (msg == NULL)
return -ENOMEM;
/* Abuse the standard BS POWER CONTROL message by specifying 'Common Channel'
* in the Protocol Discriminator field and 'BCCH' in the Channel Number IE. */
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
dh->c.msg_discr = ABIS_RSL_MDISC_COM_CHAN;
dh->c.msg_type = RSL_MT_BS_POWER_CONTROL;
dh->ie_chan = RSL_IE_CHAN_NR;
dh->chan_nr = RSL_CHAN_BCCH;
msgb_tv_put(msg, RSL_IE_BS_POWER, red / 2);
msg->dst = bts->c0->rsl_link_primary;
return abis_rsl_sendmsg(msg);
}
int bts_model_osmobts_init(void)
{
model_osmobts = bts_model_nanobts;
model_osmobts.name = "osmo-bts";
model_osmobts.type = GSM_BTS_TYPE_OSMOBTS;
model_osmobts.features_get_reported = true;
/* Unlike nanoBTS, osmo-bts does support SI2bis and SI2ter fine */
model_osmobts.force_combined_si = false;
/* Power control API */
model_osmobts.power_ctrl_send_c0_power_red = &power_ctrl_send_c0_power_red;
model_osmobts.features.data = &model_osmobts._features_data[0];
model_osmobts.features.data_len =
sizeof(model_osmobts._features_data);
memset(model_osmobts.features.data, 0, model_osmobts.features.data_len);
/* Adjust bts_init/bts_model_init in OsmoBTS to report new features.
* See also: doc/bts-features.txt */
model_osmobts.nm_att_tlvdef.def[NM_ATT_OSMO_NS_LINK_CFG].type = TLV_TYPE_TL16V;
return gsm_bts_model_register(&model_osmobts);
}
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