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lchan_fsm: introduce lchan.activate.ch_mode_rate to allow tweaking 

lchan->activate.info.ch_mode_rate should remain unchanged, it is the
immutable request data. However, for VAMOS, we will want to
automatically see that the chan_mode is chosen correctly.

As a first step, place a mutable ch_mode_rate copy at
lchan->activate.ch_mode_rate, i.e. not in .activate.info, but in
.activate. Use that everywhere.

This is mostly a non-functional change, preparing for a subsequent patch
that adds handling of VAMOS shadow lchans.

As side effect of adding lchan_activate_set_ch_mode_rate_and_mr_config()
after MODE_MODIF_ACK (enabling the voice stream after a channel mode
modify), fix AMR config: the call to lchan_mr_config() was missing.

Change-Id: Icc9cc7481b3984fdca34eef49ea91ad3388c06fe
This commit is contained in:
Neels Hofmeyr 2021-05-28 17:03:08 +00:00
parent 441cbead0e
commit 19d797c2fb
5 changed files with 20 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/osmocom/bsc/gsm_data.h
View File

@ -645,6 +645,7 @@ struct gsm_lchan {
struct {
struct lchan_activate_info info;
struct channel_mode_and_rate ch_mode_rate;
struct gsm48_multi_rate_conf mr_conf_filtered;
bool activ_ack; /*< true as soon as RSL Chan Activ Ack is received */
bool immediate_assignment_sent;

4
src/osmo-bsc/abis_rsl.c
View File

@ -534,7 +534,7 @@ int rsl_tx_chan_activ(struct gsm_lchan *lchan, uint8_t act_type, uint8_t ho_ref)
/* PDCH activation is a job for rsl_tx_dyn_ts_pdch_act_deact(); */
OSMO_ASSERT(act_type != RSL_ACT_OSMO_PDCH);
rc = channel_mode_from_lchan(&cm, lchan, &lchan->activate.info.ch_mode_rate, false);
rc = channel_mode_from_lchan(&cm, lchan, &lchan->activate.ch_mode_rate, false);
if (rc < 0) {
LOGP(DRSL, LOGL_ERROR,
"%s Cannot find channel mode from lchan type\n",
@ -608,7 +608,7 @@ int rsl_tx_chan_activ(struct gsm_lchan *lchan, uint8_t act_type, uint8_t ho_ref)
add_power_control_params(msg, RSL_IE_BS_POWER_PARAM, lchan);
add_power_control_params(msg, RSL_IE_MS_POWER_PARAM, lchan);
if (gsm48_chan_mode_to_non_vamos(lchan->activate.info.ch_mode_rate.chan_mode) == GSM48_CMODE_SPEECH_AMR) {
if (gsm48_chan_mode_to_non_vamos(lchan->activate.ch_mode_rate.chan_mode) == GSM48_CMODE_SPEECH_AMR) {
rc = put_mr_config_for_bts(msg, &lchan->activate.mr_conf_filtered,
(lchan->type == GSM_LCHAN_TCH_F) ? &bts->mr_full : &bts->mr_half);
if (rc) {

2
src/osmo-bsc/assignment_fsm.c
View File

@ -210,7 +210,7 @@ static void send_assignment_complete(struct gsm_subscriber_connection *conn)
if (gscon_is_aoip(conn)) {
/* Extrapolate speech codec from speech mode */
gsm0808_speech_codec_from_chan_type(&sc, perm_spch);
sc.cfg = conn->lchan->activate.info.ch_mode_rate.s15_s0;
sc.cfg = conn->lchan->activate.ch_mode_rate.s15_s0;
sc_ptr = &sc;
}
}

14
src/osmo-bsc/lchan_fsm.c
View File

@ -639,8 +639,11 @@ static void lchan_fsm_wait_ts_ready_onenter(struct osmo_fsm_inst *fi, uint32_t p
lchan->bs_power_db = bts->bs_power_ctrl.bs_power_val_db;
}
if (gsm48_chan_mode_to_non_vamos(info->ch_mode_rate.chan_mode) == GSM48_CMODE_SPEECH_AMR) {
if (lchan_mr_config(&lchan->activate.mr_conf_filtered, lchan, info->ch_mode_rate.s15_s0) < 0) {
lchan->activate.ch_mode_rate = lchan->activate.info.ch_mode_rate;
/* future: automatically adjust chan_mode in lchan->activate.ch_mode_rate */
if (gsm48_chan_mode_to_non_vamos(lchan->activate.ch_mode_rate.chan_mode) == GSM48_CMODE_SPEECH_AMR) {
if (lchan_mr_config(&lchan->activate.mr_conf_filtered, lchan, lchan->activate.ch_mode_rate.s15_s0) < 0) {
lchan_fail("Can not generate multirate configuration IE\n");
return;
}
@ -656,7 +659,7 @@ static void lchan_fsm_wait_ts_ready_onenter(struct osmo_fsm_inst *fi, uint32_t p
(use_mgwep_ci ? osmo_mgcpc_ep_ci_name(use_mgwep_ci) : "new")
: "none",
gsm_lchant_name(lchan->type),
gsm48_chan_mode_name(lchan->activate.info.ch_mode_rate.chan_mode),
gsm48_chan_mode_name(lchan->activate.ch_mode_rate.chan_mode),
(lchan->activate.info.encr.alg_id ? : 1)-1,
lchan->activate.info.encr.key_len ? osmo_hexdump_nospc(lchan->activate.info.encr.key,
lchan->activate.info.encr.key_len) : "none");
@ -806,7 +809,7 @@ static void lchan_fsm_post_activ_ack(struct osmo_fsm_inst *fi)
int rc;
struct gsm_lchan *lchan = lchan_fi_lchan(fi);
lchan->current_ch_mode_rate = lchan->activate.info.ch_mode_rate;
lchan->current_ch_mode_rate = lchan->activate.ch_mode_rate;
lchan->current_mr_conf = lchan->activate.mr_conf_filtered;
lchan->tsc_set = lchan->activate.tsc_set;
lchan->tsc = lchan->activate.tsc;
@ -999,6 +1002,9 @@ static void lchan_fsm_wait_rsl_chan_mode_modify_ack(struct osmo_fsm_inst *fi, ui
.tsc_set = -1,
.tsc = -1,
};
lchan->activate.ch_mode_rate = lchan->activate.info.ch_mode_rate;
/* future: automatically adjust chan_mode in lchan->activate.ch_mode_rate */
lchan->activate.concluded = false;
lchan_fsm_state_chg(LCHAN_ST_WAIT_RLL_RTP_ESTABLISH);
} else {

12
src/osmo-bsc/lchan_rtp_fsm.c
View File

@ -268,19 +268,19 @@ static void lchan_rtp_fsm_wait_ipacc_crcx_ack_onenter(struct osmo_fsm_inst *fi,
return;
}
val = ipacc_speech_mode(lchan->activate.info.ch_mode_rate.chan_mode, lchan->type);
val = ipacc_speech_mode(lchan->activate.ch_mode_rate.chan_mode, lchan->type);
if (val < 0) {
lchan_rtp_fail("Cannot determine Abis/IP speech mode for tch_mode=%s type=%s\n",
get_value_string(gsm48_chan_mode_names, lchan->activate.info.ch_mode_rate.chan_mode),
get_value_string(gsm48_chan_mode_names, lchan->activate.ch_mode_rate.chan_mode),
gsm_lchant_name(lchan->type));
return;
}
lchan->abis_ip.speech_mode = val;
val = ipacc_payload_type(lchan->activate.info.ch_mode_rate.chan_mode, lchan->type);
val = ipacc_payload_type(lchan->activate.ch_mode_rate.chan_mode, lchan->type);
if (val < 0) {
lchan_rtp_fail("Cannot determine Abis/IP payload type for tch_mode=%s type=%s\n",
get_value_string(gsm48_chan_mode_names, lchan->activate.info.ch_mode_rate.chan_mode),
get_value_string(gsm48_chan_mode_names, lchan->activate.ch_mode_rate.chan_mode),
gsm_lchant_name(lchan->type));
return;
}
@ -834,14 +834,14 @@ static int chan_mode_to_mgcp_bss_pt(enum mgcp_codecs codec)
void mgcp_pick_codec(struct mgcp_conn_peer *verb_info, const struct gsm_lchan *lchan, bool bss_side)
{
enum mgcp_codecs codec = chan_mode_to_mgcp_codec(lchan->activate.info.ch_mode_rate.chan_mode,
enum mgcp_codecs codec = chan_mode_to_mgcp_codec(lchan->activate.ch_mode_rate.chan_mode,
lchan->type == GSM_LCHAN_TCH_H? false : true);
int custom_pt;
if (codec < 0) {
LOG_LCHAN(lchan, LOGL_ERROR,
"Unable to determine MGCP codec type for %s in chan-mode %s\n",
gsm_lchant_name(lchan->type), gsm48_chan_mode_name(lchan->activate.info.ch_mode_rate.chan_mode));
gsm_lchant_name(lchan->type), gsm48_chan_mode_name(lchan->activate.ch_mode_rate.chan_mode));
verb_info->codecs_len = 0;
return;
}