Osmocom Packet control Unit (PCU): Network-side GPRS (RLC/MAC); BTS- or BSC-colocated https://osmocom.org/projects/osmopcu
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
osmo-pcu/src/tbf.cpp

956 lines
25 KiB

/* Copied from gprs_bssgp_pcu.cpp
*
* Copyright (C) 2012 Ivan Klyuchnikov
* Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu>
* Copyright (C) 2013 by Holger Hans Peter Freyther
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <new>
#include <sstream>
#include <bts.h>
#include <tbf.h>
#include <tbf_dl.h>
#include <tbf_ul.h>
#include <rlc.h>
#include <encoding.h>
#include <gprs_rlcmac.h>
#include <gprs_debug.h>
#include <gprs_ms.h>
#include <pcu_utils.h>
#include <gprs_ms_storage.h>
#include <sba.h>
#include <pdch.h>
extern "C" {
#include <osmocom/core/msgb.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/stats.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/timer_compat.h>
#include <osmocom/core/bitvec.h>
#include <osmocom/core/rate_ctr.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include "gsm_rlcmac.h"
#include "coding_scheme.h"
#include "nacc_fsm.h"
}
#include <errno.h>
#include <string.h>
extern void *tall_pcu_ctx;
unsigned int next_tbf_ctr_group_id = 0; /* Incrementing group id */
static const struct value_string tbf_counters_names[] = {
OSMO_VALUE_STRING(N3101),
OSMO_VALUE_STRING(N3103),
OSMO_VALUE_STRING(N3105),
{ 0, NULL }
};
static const struct value_string tbf_timers_names[] = {
OSMO_VALUE_STRING(T3141),
OSMO_VALUE_STRING(T3191),
{ 0, NULL }
};
static const struct rate_ctr_desc tbf_ctr_description[] = {
{ "rlc:nacked", "RLC Nacked " },
};
const struct rate_ctr_group_desc tbf_ctrg_desc = {
"pcu:tbf",
"TBF Statistics",
OSMO_STATS_CLASS_SUBSCRIBER,
ARRAY_SIZE(tbf_ctr_description),
tbf_ctr_description,
};
gprs_rlcmac_tbf::Meas::Meas() :
rssi_sum(0),
rssi_num(0)
{
timespecclear(&rssi_tv);
}
gprs_rlcmac_tbf::gprs_rlcmac_tbf(struct gprs_rlcmac_bts *bts_, GprsMs *ms, gprs_rlcmac_tbf_direction dir) :
direction(dir),
trx(NULL),
first_ts(TBF_TS_UNSET),
first_common_ts(TBF_TS_UNSET),
control_ts(TBF_TS_UNSET),
fT(0),
num_fT_exp(0),
upgrade_to_multislot(false),
bts(bts_),
m_tfi(TBF_TFI_UNSET),
m_created_ts(0),
m_ctrs(NULL),
m_ms(ms),
m_egprs_enabled(false)
{
/* The classes of these members do not have proper constructors yet.
* Just set them to 0 like talloc_zero did */
memset(&pdch, 0, sizeof(pdch));
memset(&Tarr, 0, sizeof(Tarr));
memset(&Narr, 0, sizeof(Narr));
memset(&m_ms_list, 0, sizeof(m_ms_list));
m_ms_list.entry = this;
memset(&m_trx_list, 0, sizeof(m_trx_list));
m_trx_list.entry = this;
memset(&state_fsm, 0, sizeof(state_fsm));
state_fsm.tbf = this;
state_fsm.fi = osmo_fsm_inst_alloc(&tbf_fsm, this, &state_fsm, LOGL_INFO, NULL);
OSMO_ASSERT(state_fsm.fi);
memset(&ul_ass_fsm, 0, sizeof(ul_ass_fsm));
ul_ass_fsm.tbf = this;
ul_ass_fsm.fi = osmo_fsm_inst_alloc(&tbf_ul_ass_fsm, this, &ul_ass_fsm, LOGL_INFO, NULL);
OSMO_ASSERT(ul_ass_fsm.fi);
memset(&dl_ass_fsm, 0, sizeof(dl_ass_fsm));
dl_ass_fsm.tbf = this;
dl_ass_fsm.fi = osmo_fsm_inst_alloc(&tbf_dl_ass_fsm, this, &dl_ass_fsm, LOGL_INFO, NULL);
OSMO_ASSERT(dl_ass_fsm.fi);
m_rlc.init();
m_llc.init();
m_name_buf[0] = '\0';
m_created_ts = time(NULL);
}
gprs_rlcmac_tbf::~gprs_rlcmac_tbf()
{
osmo_fsm_inst_free(state_fsm.fi);
state_fsm.fi = NULL;
osmo_fsm_inst_free(ul_ass_fsm.fi);
ul_ass_fsm.fi = NULL;
osmo_fsm_inst_free(dl_ass_fsm.fi);
dl_ass_fsm.fi = NULL;
rate_ctr_group_free(m_ctrs);
}
uint32_t gprs_rlcmac_tbf::tlli() const
{
return m_ms ? ms_tlli(m_ms) : GSM_RESERVED_TMSI;
}
const char *gprs_rlcmac_tbf::imsi() const
{
return ms_imsi(m_ms);
}
uint8_t gprs_rlcmac_tbf::ta() const
{
return ms_ta(m_ms);
}
void gprs_rlcmac_tbf::set_ta(uint8_t ta)
{
ms_set_ta(m_ms, ta);
}
uint8_t gprs_rlcmac_tbf::ms_class() const
{
return ms_ms_class(m_ms);
}
enum CodingScheme gprs_rlcmac_tbf::current_cs() const
{
enum CodingScheme cs;
enum mcs_kind req_mcs_kind = is_egprs_enabled() ? EGPRS : GPRS;
if (direction == GPRS_RLCMAC_UL_TBF)
cs = ms_current_cs_ul(m_ms);
else
cs = ms_current_cs_dl(m_ms, req_mcs_kind);
return cs;
}
gprs_llc_queue *gprs_rlcmac_tbf::llc_queue()
{
return ms_llc_queue(m_ms);
}
const gprs_llc_queue *gprs_rlcmac_tbf::llc_queue() const
{
return ms_llc_queue(m_ms);
}
void gprs_rlcmac_tbf::set_ms(GprsMs *ms)
{
if (m_ms == ms)
return;
if (m_ms)
ms_detach_tbf(m_ms, this);
m_ms = ms;
if (m_ms)
ms_attach_tbf(m_ms, this);
}
void gprs_rlcmac_tbf::update_ms(uint32_t tlli, enum gprs_rlcmac_tbf_direction dir)
{
if (tlli == GSM_RESERVED_TMSI)
return;
/* TODO: When the TLLI does not match the ms, check if there is another
* MS object that belongs to that TLLI and if yes make sure one of them
* gets deleted. This is the same problem that can arise with
* IMSI in gprs_rlcmac_dl_tbf::handle() so there should be a unified solution */
if (!ms_check_tlli(ms(), tlli)) {
GprsMs *old_ms;
old_ms = bts_ms_store(bts)->get_ms(tlli, 0, NULL);
if (old_ms)
ms_merge_and_clear_ms(ms(), old_ms);
}
if (dir == GPRS_RLCMAC_UL_TBF)
ms_set_tlli(ms(), tlli);
else
ms_confirm_tlli(ms(), tlli);
}
static void tbf_unlink_pdch(struct gprs_rlcmac_tbf *tbf)
{
int ts;
/* During assignment (state=ASSIGN), tbf may be temporarily using
* tbf->control_ts from a previous TBF/SBA to transmit the UL/DL
* Assignment, which may not be necessarily be a TS where the current TBF
* is attached to. This will be the case until a TBF receives proper
* confirmation from the MS and goes through the FLOW state. Hence, we
* may have ULC pollings ongoing and we need to make sure we drop all
* reserved nodes there: */
if (tbf->control_ts != TBF_TS_UNSET && !tbf->pdch[tbf->control_ts])
pdch_ulc_release_tbf(tbf->trx->pdch[tbf->control_ts].ulc, tbf);
/* Now simply detach from all attached PDCHs */
for (ts = 0; ts < 8; ts++) {
if (!tbf->pdch[ts])
continue;
tbf->pdch[ts]->detach_tbf(tbf);
tbf->pdch[ts] = NULL;
}
}
void tbf_free(struct gprs_rlcmac_tbf *tbf)
{
/* update counters */
if (tbf->direction == GPRS_RLCMAC_UL_TBF) {
bts_do_rate_ctr_inc(tbf->bts, CTR_TBF_UL_FREED);
if (tbf->state_is(TBF_ST_FLOW))
bts_do_rate_ctr_inc(tbf->bts, CTR_TBF_UL_ABORTED);
} else {
gprs_rlcmac_dl_tbf *dl_tbf = as_dl_tbf(tbf);
gprs_rlc_dl_window *win = static_cast<gprs_rlc_dl_window *>(dl_tbf->window());
bts_do_rate_ctr_inc(tbf->bts, CTR_TBF_DL_FREED);
if (tbf->state_is(TBF_ST_FLOW)) {
bts_do_rate_ctr_inc(tbf->bts, CTR_TBF_DL_ABORTED);
/* range V(A)..V(S)-1 */
uint16_t lost = win->count_unacked();
/* report all outstanding packets as lost */
gprs_rlcmac_received_lost(dl_tbf, 0, lost);
/* TODO: Reschedule all LLC frames starting with the one that is
* (partly) encoded in chunk 1 of block V(A). (optional) */
}
/* reset rlc states */
win->reset();
}
LOGPTBF(tbf, LOGL_INFO, "free\n");
tbf->stop_timers("freeing TBF");
/* TODO: Could/Should generate bssgp_tx_llc_discarded */
tbf_unlink_pdch(tbf);
llist_del(tbf_trx_list(tbf));
if (tbf->ms())
tbf->set_ms(NULL);
LOGP(DTBF, LOGL_DEBUG, "********** %s-TBF ends here **********\n",
(tbf->direction != GPRS_RLCMAC_UL_TBF) ? "DL" : "UL");
talloc_free(tbf);
}
uint16_t egprs_window_size(const struct gprs_rlcmac_bts *bts, uint8_t slots)
{
uint8_t num_pdch = pcu_bitcount(slots);
return OSMO_MIN((num_pdch != 1) ? (128 * num_pdch) : 192,
OSMO_MAX(64, (the_pcu->vty.ws_base + num_pdch * the_pcu->vty.ws_pdch) / 32 * 32));
}
int gprs_rlcmac_tbf::update()
{
int rc;
LOGP(DTBF, LOGL_DEBUG, "********** DL-TBF update **********\n");
OSMO_ASSERT(direction == GPRS_RLCMAC_DL_TBF);
tbf_unlink_pdch(this);
rc = the_pcu->alloc_algorithm(bts, this, false, -1);
/* if no resource */
if (rc < 0) {
LOGPTBF(this, LOGL_ERROR, "No resource after update???\n");
bts_do_rate_ctr_inc(bts, CTR_TBF_ALLOC_FAIL);
return rc;
}
if (is_egprs_enabled()) {
gprs_rlcmac_dl_tbf *dl_tbf = as_dl_tbf(this);
if (dl_tbf)
dl_tbf->set_window_size();
}
tbf_update_state_fsm_name(this);
return 0;
}
void tbf_assign_control_ts(struct gprs_rlcmac_tbf *tbf)
{
if (tbf->control_ts == TBF_TS_UNSET)
LOGPTBF(tbf, LOGL_INFO, "Setting Control TS %d\n",
tbf->first_common_ts);
else if (tbf->control_ts != tbf->first_common_ts)
LOGPTBF(tbf, LOGL_INFO, "Changing Control TS %d -> %d\n",
tbf->control_ts, tbf->first_common_ts);
tbf->control_ts = tbf->first_common_ts;
}
void gprs_rlcmac_tbf::n_reset(enum tbf_counters n)
{
if (n >= N_MAX) {
LOGPTBF(this, LOGL_ERROR, "attempting to reset unknown counter %s\n",
get_value_string(tbf_counters_names, n));
return;
}
Narr[n] = 0;
}
/* Increment counter and check for MAX value (return true if we hit it) */
bool gprs_rlcmac_tbf::n_inc(enum tbf_counters n)
{
uint8_t chk;
if (n >= N_MAX) {
LOGPTBF(this, LOGL_ERROR, "attempting to increment unknown counter %s\n",
get_value_string(tbf_counters_names, n));
return true;
}
Narr[n]++;
switch(n) {
case N3101:
chk = bts->n3101;
break;
case N3103:
chk = bts->n3103;
break;
case N3105:
chk = bts->n3105;
break;
default:
LOGPTBF(this, LOGL_ERROR, "unhandled counter %s\n",
get_value_string(tbf_counters_names, n));
return true;
}
if (Narr[n] == chk) {
LOGPTBF(this, LOGL_NOTICE, "%s exceeded MAX (%u)\n",
get_value_string(tbf_counters_names, n), chk);
return true;
} else {
LOGPTBF(this, LOGL_DEBUG, "%s %" PRIu8 " => %" PRIu8 " (< MAX %" PRIu8 ")\n",
get_value_string(tbf_counters_names, n), Narr[n] - 1, Narr[n], chk);
return false;
}
}
void gprs_rlcmac_tbf::t_stop(enum tbf_timers t, const char *reason)
{
if (t >= T_MAX) {
LOGPTBF(this, LOGL_ERROR, "attempting to stop unknown timer %s [%s]\n",
get_value_string(tbf_timers_names, t), reason);
return;
}
if (osmo_timer_pending(&Tarr[t])) {
LOGPTBF(this, LOGL_DEBUG, "stopping timer %s [%s]\n",
get_value_string(tbf_timers_names, t), reason);
osmo_timer_del(&Tarr[t]);
}
}
/* check if any of T31xx timer(s) are pending */
bool gprs_rlcmac_tbf::timers_pending(enum tbf_timers t)
{
uint8_t i;
if (t != T_MAX)
return osmo_timer_pending(&Tarr[t]);
for (i = T3141; i < T_MAX; i++)
if (osmo_timer_pending(&Tarr[i]))
return true;
return false;
}
void gprs_rlcmac_tbf::stop_timers(const char *reason)
{
uint8_t i;
for (i = T3141; i < T_MAX; i++)
t_stop((enum tbf_timers)i, reason);
}
static inline void tbf_timeout_free(struct gprs_rlcmac_tbf *tbf, enum tbf_timers t, bool run_diag)
{
if (run_diag) {
LOGPTBF(tbf, LOGL_NOTICE, "%s timeout expired, freeing TBF: %s\n",
get_value_string(tbf_timers_names, t), tbf_rlcmac_diag(tbf));
} else {
LOGPTBF(tbf, LOGL_NOTICE, "%s timeout expired, freeing TBF\n",
get_value_string(tbf_timers_names, t));
}
tbf_free(tbf);
}
#define T_CBACK(t, diag) static void cb_##t(void *_tbf) { tbf_timeout_free((struct gprs_rlcmac_tbf *)_tbf, t, diag); }
/* 3GPP TS 44.018 sec 3.5.2.1.5: On the network side, if timer T3141 elapses
* before a successful contention resolution procedure is completed, the newly
* allocated temporary block flow is released as specified in 3GPP TS 44.060 and
* the packet access is forgotten.*/
T_CBACK(T3141, true)
T_CBACK(T3191, true)
void gprs_rlcmac_tbf::t_start(enum tbf_timers t, int T, const char *reason, bool force,
const char *file, unsigned line)
{
int current_fn = bts_current_frame_number(bts);
int sec;
int microsec;
struct osmo_tdef *tdef;
if (!(tdef = osmo_tdef_get_entry(bts->T_defs_bts, T)))
tdef = osmo_tdef_get_entry(bts->pcu->T_defs, T);
if (t >= T_MAX || !tdef) {
LOGPSRC(DTBF, LOGL_ERROR, file, line, "%s attempting to start unknown timer %s [%s], cur_fn=%d\n",
tbf_name(this), get_value_string(tbf_timers_names, t), reason, current_fn);
return;
}
if (!force && osmo_timer_pending(&Tarr[t]))
return;
switch (tdef->unit) {
case OSMO_TDEF_MS:
sec = 0;
microsec = tdef->val * 1000;
break;
case OSMO_TDEF_S:
sec = tdef->val;
microsec = 0;
break;
default:
/* so far only timers using MS and S */
OSMO_ASSERT(false);
}
LOGPSRC(DTBF, LOGL_DEBUG, file, line, "%s %sstarting timer %s [%s] with %u sec. %u microsec, cur_fn=%d\n",
tbf_name(this), osmo_timer_pending(&Tarr[t]) ? "re" : "",
get_value_string(tbf_timers_names, t), reason, sec, microsec, current_fn);
Tarr[t].data = this;
switch(t) {
case T3141:
Tarr[t].cb = cb_T3141;
break;
case T3191:
Tarr[t].cb = cb_T3191;
break;
default:
LOGPSRC(DTBF, LOGL_ERROR, file, line, "%s attempting to set callback for unknown timer %s [%s], cur_fn=%d\n",
tbf_name(this), get_value_string(tbf_timers_names, t), reason, current_fn);
}
osmo_timer_schedule(&Tarr[t], sec, microsec);
}
int gprs_rlcmac_tbf::check_polling(uint32_t fn, uint8_t ts,
uint32_t *poll_fn_, unsigned int *rrbp_) const
{
int rc;
if (!is_control_ts(ts)) {
LOGPTBF(this, LOGL_DEBUG, "Polling cannot be "
"scheduled in this TS %d (first control TS %d)\n",
ts, control_ts);
return -EINVAL;
}
if ((rc = pdch_ulc_get_next_free_rrbp_fn(trx->pdch[ts].ulc, fn, poll_fn_, rrbp_)) < 0) {
LOGPTBF(this, LOGL_NOTICE,
"(bts=%u,trx=%u,ts=%u) FN=%u No suitable free RRBP offset found!\n",
trx->bts->nr, trx->trx_no, ts, fn);
return rc;
}
return 0;
}
void gprs_rlcmac_tbf::set_polling(uint32_t new_poll_fn, uint8_t ts, enum pdch_ulc_tbf_poll_reason reason)
{
/* schedule polling */
if (pdch_ulc_reserve_tbf_poll(trx->pdch[ts].ulc, new_poll_fn, this, reason) < 0)
LOGPTBFDL(this, LOGL_ERROR, "Failed scheduling poll on PACCH (FN=%d, TS=%d)\n",
new_poll_fn, ts);
}
void gprs_rlcmac_tbf::poll_timeout(struct gprs_rlcmac_pdch *pdch, uint32_t poll_fn, enum pdch_ulc_tbf_poll_reason reason)
{
gprs_rlcmac_ul_tbf *ul_tbf;
gprs_rlcmac_dl_tbf *dl_tbf;
LOGPTBF(this, LOGL_NOTICE, "poll timeout for FN=%d, TS=%d (curr FN %d)\n",
poll_fn, pdch->ts_no, bts_current_frame_number(bts));
switch (reason) {
case PDCH_ULC_POLL_UL_ACK:
ul_tbf = as_ul_tbf(this);
OSMO_ASSERT(ul_tbf);
if (!tbf_ul_ack_exp_ctrl_ack(ul_tbf, poll_fn, pdch->ts_no)) {
LOGPTBF(this, LOGL_NOTICE, "FN=%d, TS=%d (curr FN %d): POLL_UL_ACK not expected!\n",
poll_fn, pdch->ts_no, bts_current_frame_number(bts));
return;
}
bts_do_rate_ctr_inc(bts, CTR_RLC_ACK_TIMEDOUT);
bts_do_rate_ctr_inc(bts, CTR_PUAN_POLL_TIMEDOUT);
if (state_is(TBF_ST_FINISHED)) {
if (ul_tbf->n_inc(N3103)) {
bts_do_rate_ctr_inc(bts, CTR_PUAN_POLL_FAILED);
osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_MAX_N3103, NULL);
return;
}
}
osmo_fsm_inst_dispatch(ul_tbf->ul_ack_fsm.fi, TBF_UL_ACK_EV_POLL_TIMEOUT, NULL);
break;
case PDCH_ULC_POLL_UL_ASS:
if (!ul_ass_state_is(TBF_UL_ASS_WAIT_ACK)) {
LOGPTBF(this, LOGL_NOTICE, "FN=%d, TS=%d (curr FN %d): POLL_UL_ASS not expected! state is %s\n",
poll_fn, pdch->ts_no, bts_current_frame_number(bts),
osmo_fsm_inst_state_name(tbf_ul_ass_fi(this)));
return;
}
bts_do_rate_ctr_inc(bts, CTR_RLC_ASS_TIMEDOUT);
bts_do_rate_ctr_inc(bts, CTR_PUA_POLL_TIMEDOUT);
if (n_inc(N3105)) {
osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_MAX_N3105, NULL);
bts_do_rate_ctr_inc(bts, CTR_RLC_ASS_FAILED);
bts_do_rate_ctr_inc(bts, CTR_PUA_POLL_FAILED);
return;
}
/* Signal timeout to FSM to reschedule UL assignment */
osmo_fsm_inst_dispatch(this->ul_ass_fsm.fi, TBF_UL_ASS_EV_ASS_POLL_TIMEOUT, NULL);
break;
case PDCH_ULC_POLL_DL_ASS:
if (!dl_ass_state_is(TBF_DL_ASS_WAIT_ACK)) {
LOGPTBF(this, LOGL_NOTICE, "FN=%d, TS=%d (curr FN %d): POLL_DL_ASS not expected! state is %s\n",
poll_fn, pdch->ts_no, bts_current_frame_number(bts),
osmo_fsm_inst_state_name(tbf_dl_ass_fi(this)));
return;
}
bts_do_rate_ctr_inc(bts, CTR_RLC_ASS_TIMEDOUT);
bts_do_rate_ctr_inc(bts, CTR_PDA_POLL_TIMEDOUT);
if (n_inc(N3105)) {
osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_MAX_N3105, NULL);
bts_do_rate_ctr_inc(bts, CTR_RLC_ASS_FAILED);
bts_do_rate_ctr_inc(bts, CTR_PDA_POLL_FAILED);
return;
}
/* Signal timeout to FSM to reschedule DL assignment */
osmo_fsm_inst_dispatch(this->dl_ass_fsm.fi, TBF_DL_ASS_EV_ASS_POLL_TIMEOUT, NULL);
break;
case PDCH_ULC_POLL_CELL_CHG_CONTINUE:
if (!m_ms->nacc || !nacc_fsm_exp_ctrl_ack(m_ms->nacc, poll_fn, pdch->ts_no)) {
LOGPTBF(this, LOGL_NOTICE, "FN=%d, TS=%d (curr FN %d): POLL_CELL_CHG_CONTINUE not expected!\n",
poll_fn, pdch->ts_no, bts_current_frame_number(bts));
return;
}
/* Timeout waiting for CTRL ACK acking Pkt Cell Change Continue */
osmo_fsm_inst_dispatch(m_ms->nacc->fi, NACC_EV_TIMEOUT_CELL_CHG_CONTINUE, NULL);
break;
case PDCH_ULC_POLL_DL_ACK:
dl_tbf = as_dl_tbf(this);
/* POLL Timeout expecting DL ACK/NACK: implies direction == GPRS_RLCMAC_DL_TBF */
OSMO_ASSERT(dl_tbf);
if (!(dl_tbf->state_fsm.state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK))) {
LOGPTBF(this, LOGL_NOTICE,
"Timeout for polling PACKET DOWNLINK ACK: %s\n",
tbf_rlcmac_diag(dl_tbf));
dl_tbf->state_fsm.state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK);
}
if (dl_tbf->state_is(TBF_ST_RELEASING))
bts_do_rate_ctr_inc(bts, CTR_RLC_REL_TIMEDOUT);
else {
bts_do_rate_ctr_inc(bts, CTR_RLC_ACK_TIMEDOUT);
bts_do_rate_ctr_inc(bts, CTR_PDAN_POLL_TIMEDOUT);
}
if (dl_tbf->n_inc(N3105)) {
osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_MAX_N3105, NULL);
bts_do_rate_ctr_inc(bts, CTR_PDAN_POLL_FAILED);
bts_do_rate_ctr_inc(bts, CTR_RLC_ACK_FAILED);
return;
}
/* resend IMM.ASS on CCCH on timeout */
osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_DL_ACKNACK_MISS, NULL);
break;
default:
LOGPTBF(this, LOGL_ERROR, "Poll Timeout, reason %s unhandled!\n",
get_value_string(pdch_ulc_tbf_poll_reason_names, reason));
}
}
int gprs_rlcmac_tbf::setup(int8_t use_trx, bool single_slot)
{
int rc;
if (ms_mode(m_ms) != GPRS)
enable_egprs();
/* select algorithm */
rc = the_pcu->alloc_algorithm(bts, this, single_slot, use_trx);
/* if no resource */
if (rc < 0) {
LOGPTBF(this, LOGL_NOTICE,
"Timeslot Allocation failed: trx = %d, single_slot = %d\n",
use_trx, single_slot);
bts_do_rate_ctr_inc(bts, CTR_TBF_ALLOC_FAIL);
return -1;
}
/* assign initial control ts */
tbf_assign_control_ts(this);
/* set timestamp */
osmo_clock_gettime(CLOCK_MONOTONIC, &meas.rssi_tv);
LOGPTBF(this, LOGL_INFO,
"Allocated: trx = %d, ul_slots = %02x, dl_slots = %02x\n",
this->trx->trx_no, ul_slots(), dl_slots());
m_ctrs = rate_ctr_group_alloc(this, &tbf_ctrg_desc, next_tbf_ctr_group_id++);
if (!m_ctrs) {
LOGPTBF(this, LOGL_ERROR, "Couldn't allocate TBF counters\n");
return -1;
}
tbf_update_state_fsm_name(this);
ms_attach_tbf(m_ms, this);
return 0;
}
int gprs_rlcmac_tbf::establish_dl_tbf_on_pacch()
{
struct gprs_rlcmac_dl_tbf *new_tbf = NULL;
bts_do_rate_ctr_inc(bts, CTR_TBF_REUSED);
new_tbf = tbf_alloc_dl_tbf(bts, ms(),
this->trx->trx_no, false);
if (!new_tbf) {
LOGP(DTBF, LOGL_NOTICE, "No PDCH resource\n");
return -1;
}
LOGPTBF(this, LOGL_DEBUG, "Trigger downlink assignment on PACCH\n");
new_tbf->trigger_ass(this);
return 0;
}
const char *tbf_name(const gprs_rlcmac_tbf *tbf)
{
return tbf ? tbf->name() : "(no TBF)";
}
const char *gprs_rlcmac_tbf::name() const
{
int8_t tfi = (m_tfi == TBF_TS_UNSET) ? -1 : m_tfi;
snprintf(m_name_buf, sizeof(m_name_buf) - 1,
"TBF(TFI=%d TLLI=0x%08x DIR=%s STATE=%s%s)",
tfi, tlli(),
direction == GPRS_RLCMAC_UL_TBF ? "UL" : "DL",
state_name(),
is_egprs_enabled() ? " EGPRS" : ""
);
m_name_buf[sizeof(m_name_buf) - 1] = '\0';
return m_name_buf;
}
void tbf_update_state_fsm_name(struct gprs_rlcmac_tbf *tbf)
{
char buf[64];
int8_t tfi = (tbf_tfi(tbf) == TBF_TS_UNSET) ? -1 : tbf_tfi(tbf);
snprintf(buf, sizeof(buf), "%s-TFI_%d",
tbf_direction(tbf) == GPRS_RLCMAC_UL_TBF ? "UL" : "DL",
tfi);
osmo_identifier_sanitize_buf(buf, NULL, '_');
osmo_fsm_inst_update_id(tbf->state_fsm.fi, buf);
osmo_fsm_inst_update_id(tbf->ul_ass_fsm.fi, buf);
osmo_fsm_inst_update_id(tbf->dl_ass_fsm.fi, buf);
if (tbf_direction(tbf) == GPRS_RLCMAC_UL_TBF) {
struct gprs_rlcmac_ul_tbf *ul_tbf = as_ul_tbf(tbf);
osmo_fsm_inst_update_id(ul_tbf->ul_ack_fsm.fi, buf);
}
}
void gprs_rlcmac_tbf::rotate_in_list()
{
llist_del(tbf_trx_list((struct gprs_rlcmac_tbf *)this));
if (direction == GPRS_RLCMAC_UL_TBF)
llist_add(tbf_trx_list((struct gprs_rlcmac_tbf *)this), &trx->ul_tbfs);
else
llist_add(tbf_trx_list((struct gprs_rlcmac_tbf *)this), &trx->dl_tbfs);
}
uint8_t gprs_rlcmac_tbf::dl_slots() const
{
uint8_t slots = 0;
size_t i;
if (direction == GPRS_RLCMAC_UL_TBF)
return 0;
for (i = 0; i < ARRAY_SIZE(pdch); i += 1)
if (pdch[i])
slots |= 1 << i;
return slots;
}
uint8_t gprs_rlcmac_tbf::ul_slots() const
{
uint8_t slots = 0;
size_t i;
if (direction == GPRS_RLCMAC_DL_TBF) {
if (control_ts < 8)
slots |= 1 << control_ts;
if (first_common_ts < 8)
slots |= 1 << first_common_ts;
return slots;
}
for (i = 0; i < ARRAY_SIZE(pdch); i += 1)
if (pdch[i])
slots |= 1 << i;
return slots;
}
bool gprs_rlcmac_tbf::is_control_ts(uint8_t ts) const
{
return ts == control_ts;
}
void gprs_rlcmac_tbf::enable_egprs()
{
/* Decrease GPRS TBF count of attached PDCHs */
for (size_t ts = 0; ts < ARRAY_SIZE(pdch); ts++) {
if (pdch[ts])
pdch[ts]->num_tbfs_update(this, false);
}
m_egprs_enabled = true;
window()->set_sns(RLC_EGPRS_SNS);
/* Increase EGPRS TBF count of attached PDCHs */
for (size_t ts = 0; ts < ARRAY_SIZE(pdch); ts++) {
if (pdch[ts])
pdch[ts]->num_tbfs_update(this, true);
}
}
/* C API */
enum tbf_fsm_states tbf_state(const struct gprs_rlcmac_tbf *tbf)
{
return (enum tbf_fsm_states)tbf->state_fsm.fi->state;
}
struct osmo_fsm_inst *tbf_ul_ass_fi(const struct gprs_rlcmac_tbf *tbf)
{
return tbf->ul_ass_fsm.fi;
}
struct osmo_fsm_inst *tbf_dl_ass_fi(const struct gprs_rlcmac_tbf *tbf)
{
return tbf->dl_ass_fsm.fi;
}
enum gprs_rlcmac_tbf_direction tbf_direction(const struct gprs_rlcmac_tbf *tbf)
{
return tbf->direction;
}
void tbf_set_ms(struct gprs_rlcmac_tbf *tbf, GprsMs *ms)
{
tbf->set_ms(ms);
}
struct llist_head *tbf_ms_list(struct gprs_rlcmac_tbf *tbf)
{
return &tbf->m_ms_list.list;
}
struct llist_head *tbf_trx_list(struct gprs_rlcmac_tbf *tbf)
{
return &tbf->m_trx_list.list;
}
struct GprsMs *tbf_ms(const struct gprs_rlcmac_tbf *tbf)
{
return tbf->ms();
}
bool tbf_timers_pending(struct gprs_rlcmac_tbf *tbf, enum tbf_timers t)
{
return tbf->timers_pending(t);
}
struct gprs_llc *tbf_llc(struct gprs_rlcmac_tbf *tbf)
{
return &tbf->m_llc;
}
uint8_t tbf_first_common_ts(const struct gprs_rlcmac_tbf *tbf)
{
return tbf->first_common_ts;
}
uint8_t tbf_dl_slots(const struct gprs_rlcmac_tbf *tbf)
{
return tbf->dl_slots();
}
uint8_t tbf_ul_slots(const struct gprs_rlcmac_tbf *tbf)
{
return tbf->ul_slots();
}
bool tbf_is_tfi_assigned(const struct gprs_rlcmac_tbf *tbf)
{
return tbf->is_tfi_assigned();
}
uint8_t tbf_tfi(const struct gprs_rlcmac_tbf *tbf)
{
return tbf->tfi();
}
bool tbf_is_egprs_enabled(const struct gprs_rlcmac_tbf *tbf)
{
return tbf->is_egprs_enabled();
}
int tbf_check_polling(const struct gprs_rlcmac_tbf *tbf, uint32_t fn, uint8_t ts, uint32_t *poll_fn, unsigned int *rrbp)
{
return tbf->check_polling(fn, ts, poll_fn, rrbp);
}
void tbf_set_polling(struct gprs_rlcmac_tbf *tbf, uint32_t new_poll_fn, uint8_t ts, enum pdch_ulc_tbf_poll_reason t)
{
return tbf->set_polling(new_poll_fn, ts, t);
}
void tbf_poll_timeout(struct gprs_rlcmac_tbf *tbf, struct gprs_rlcmac_pdch *pdch, uint32_t poll_fn, enum pdch_ulc_tbf_poll_reason reason)
{
tbf->poll_timeout(pdch, poll_fn, reason);
}
bool tbf_is_control_ts(const struct gprs_rlcmac_tbf *tbf, uint8_t ts)
{
return tbf->is_control_ts(ts);
}
bool tbf_can_upgrade_to_multislot(const struct gprs_rlcmac_tbf *tbf)
{
return tbf->upgrade_to_multislot;
}
int tbf_update(struct gprs_rlcmac_tbf *tbf)
{
return tbf->update();
}
const char* tbf_rlcmac_diag(const struct gprs_rlcmac_tbf *tbf)
{
static char buf[256];
struct osmo_strbuf sb = { .buf = buf, .len = sizeof(buf) };
OSMO_STRBUF_PRINTF(sb, "|");
if (tbf->state_fsm.state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))
OSMO_STRBUF_PRINTF(sb, "Assignment was on CCCH|");
if (tbf->state_fsm.state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))
OSMO_STRBUF_PRINTF(sb, "Assignment was on PACCH|");
if (tbf->direction == GPRS_RLCMAC_UL_TBF) {
const struct gprs_rlcmac_ul_tbf *ul_tbf = static_cast<const gprs_rlcmac_ul_tbf *>(tbf);
if (ul_tbf->m_rx_counter)
OSMO_STRBUF_PRINTF(sb, "Uplink data was received|");
else
OSMO_STRBUF_PRINTF(sb, "No uplink data received yet|");
} else {
if (tbf->state_fsm.state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK))
OSMO_STRBUF_PRINTF(sb, "Downlink ACK was received|");
else
OSMO_STRBUF_PRINTF(sb, "No downlink ACK received yet|");
}
return buf;
}