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osmo-pcu
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todo 

Signed-off-by: Max <msuraev@sysmocom.de>
This commit is contained in:
Max 2016-02-12 14:59:00 +01:00
parent a5ae651ee4
commit 48301471dd
4 changed files with 187 additions and 28 deletions
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15
src/bts.cpp
View File

@ -196,13 +196,13 @@ void BTS::set_current_block_frame_number(int fn, unsigned max_delay)
if (current_frame_number() != 0)
delay = (fn + 2715648 * 3 / 2 - current_frame_number()) % 2715648
- 2715648/2;
/* if (delay <= -late_block_delay_thresh) {
if (delay <= -late_block_delay_thresh) {
LOGP(DRLCMAC, LOGL_NOTICE,
"Late RLC block, FN delta: %d FN: %d curFN: %d\n",
delay, fn, current_frame_number());
rlc_late_block();
}
FIXME - enable back before committing*/
m_cur_blk_fn = fn;
if (delay < fn_update_ok_min_delay || delay > fn_update_ok_max_delay ||
current_frame_number() == 0)
@ -560,18 +560,19 @@ void BTS::trigger_dl_ts_recon(gprs_rlcmac_dl_tbf *dl_tbf)//FIXME: no actual send
/* stop pending timer */
dl_tbf->stop_timer();
LOGP(DRLCMAC, LOGL_DEBUG, "PTSR: Send TS RECONFIGURE for %s on PCH (IMSI=%s)\n", tbf_name(dl_tbf), dl_tbf->imsi());
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: Send TS RECONFIGURE for %s on PCH (IMSI=%s)\n", tbf_name(dl_tbf), dl_tbf->imsi());
// FIXME: change state - dl_ass_state vs tbf->state vs state_flags
/* change state */
dl_tbf->set_state(GPRS_RLCMAC_RECONFIGURING); // FIXME - more flags?
if (!(dl_tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) // FIXME: are we doing it right here?
dl_tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH);
dl_tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS;
//tbf->was_releasing = tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE); // what's was_releasing for?
dl_tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS; // FIXME: use dedicated state and enum
dl_tbf->was_releasing = dl_tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE); // what's was_releasing for?
/* "send" PACKET TS RECON. */
tbf_timer_start(dl_tbf, 0, Tassign_pacch); // FIXME - do we have to wait for ACK from phone?
tbf_timer_start(dl_tbf, 0, Tassign_pacch); // FIXME - do we have to time this?
}
/* depending on the current TBF, we assign on PACCH or AGCH */

21
src/gprs_rlcmac_sched.cpp
View File

@ -130,6 +130,19 @@ static struct msgb *sched_select_ctrl_msg(
if (!tbf)
continue;
// schedule PTSR if necessary
if (tbf->direction == GPRS_RLCMAC_DL_TBF && tbf->state_is(GPRS_RLCMAC_RECONFIGURING)) {
//tbf = dl_ass_tbf;
//msg = tbf->create_dl_ts_recon(fn, ts);
if (tbf == dl_ass_tbf) {
LOGP(DRLCMACSCHED, LOGL_NOTICE, "PTSR: scheduling on %s\n", tbf_name(dl_ass_tbf));
msg = dl_ass_tbf->create_dl_ts_recon(fn, ts);
if (msg)
break;
} else
LOGP(DRLCMACSCHED, LOGL_NOTICE, "PTSR: FIXME - scheduling PTSR on non-DL TBF\n");
}
/*
* Assignments for the same direction have lower precedence,
* because they may kill the TBF when the CONTOL ACK is
@ -152,7 +165,7 @@ static struct msgb *sched_select_ctrl_msg(
pdch->next_ctrl_prio %= 3;
break;
}
if (!msg) {
/*
* If one of these is left, the response (CONTROL ACK) from the
@ -167,12 +180,6 @@ static struct msgb *sched_select_ctrl_msg(
msg = ul_ass_tbf->create_ul_ass(fn, ts);
}
}
if (!msg) {
// create PACKET RS RECONFIGURE (check for state)
tbf = dl_ass_tbf;
msg = dl_ass_tbf->create_dl_ts_recon(fn, ts);
}
/* any message */
if (msg) {

171
src/tbf.cpp
View File

@ -862,10 +862,10 @@ void gprs_rlcmac_tbf::handle_timeout()
dl_tbf->update(); // do the MSLOT assignment
// dl_tbf->bts->trigger_dl_ass(dl_tbf, dl_tbf); // FIXME: use write_packet_ts_reconfigure()
// [state/flags change] ->
//LOGP(DRLCMAC, LOGL_NOTICE, "DL. ASS. for multislot\n");
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: trigger for multislot\n");
dl_tbf->bts->trigger_dl_ts_recon(dl_tbf);
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: trigger set\n");
// abort(); // CRASH!
} else
LOGP(DRLCMAC, LOGL_NOTICE, "%s Continue flow after "
@ -910,13 +910,10 @@ int gprs_rlcmac_tbf::rlcmac_diag()
return 0;
}
struct msgb *gprs_rlcmac_tbf::create_dl_ts_recon(uint32_t fn, uint8_t ts)
struct msgb *gprs_rlcmac_tbf::create_dl_ts_recon_exp(uint32_t fn, uint8_t ts)
{
// FIXME - check appropriate flags
if (this->state_is_not(GPRS_RLCMAC_RECONFIGURING)) {
// LOGP(DRLCMAC, LOGL_NOTICE, "TS. R. -- ignoring due to incompatible state\n");
return NULL;
}
// FIXME - check appropriate flags?
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: GPRS_RLCMAC_RECONFIGURING: preparing msg\n");
unsigned int rrbp = 0;
uint32_t new_poll_fn = 0;
@ -927,31 +924,179 @@ struct msgb *gprs_rlcmac_tbf::create_dl_ts_recon(uint32_t fn, uint8_t ts)
LOGP(DRLCMAC, LOGL_ERROR, "PTSR: check polling failed!\n");
return NULL;
}
// LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: polling checked\n");
msg = msgb_alloc(23, "rlcmac_pack_ts_recon");
if (!msg) {
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: msg alloc failed\n");
return NULL;
}
// LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: msg alloc ok\n");
bitvec *recon_vec = bitvec_alloc(123);
if (!recon_vec) {
msgb_free(msg);
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: bitvec alloc failed\n");
return NULL;
}
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: bitvec alloc ok\n");
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: %s start Packet TS Reconfigure (PACCH)\n", tbf_name(this)); // abort()?
bitvec_unhex(recon_vec, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
LOGP(DRLCMAC, LOGL_INFO, "PTSR: %s start Packet TS Reconfigure (PACCH)\n", tbf_name(this));
RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t);
Encoding::write_packet_ts_reconfigure(mac_control_block, this, new_poll_fn, rrbp, bts_data()->alpha, bts_data()->gamma, this->is_egprs_enabled());
LOGP(DRLCMAC, LOGL_DEBUG, "PTSR: +++++++++++++++++++++++++ TX : Packet TS Reconfigure +++++++++++++++++++++++++\n");
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: +++++++++++++++++++++++++ TX : Packet TS Reconfigure +++++++++++++++++++++++++\n");
encode_gsm_rlcmac_downlink(recon_vec, mac_control_block);
LOGPC(DCSN1, LOGL_NOTICE, "\n");
LOGP(DRLCMAC, LOGL_DEBUG, "PTSR: _________________________ TX : Packet TS Reconfigure _________________________\n");
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: _________________________ TX : Packet TS Reconfigure _________________________\n");
bitvec_pack(recon_vec, msgb_put(msg, 23)); // FIXME - size?
bitvec_free(recon_vec);
talloc_free(mac_control_block);
// FIXME: change to proper state before returning
// if (poll_ass_dl) {
set_polling(new_poll_fn, ts);
// if (new_dl_tbf->state_is(GPRS_RLCMAC_ASSIGN))
this->set_state(GPRS_RLCMAC_WAIT_ASSIGN);
dl_ass_state = GPRS_RLCMAC_DL_ASS_WAIT_ACK;
LOGP(DRLCMACDL, LOGL_INFO,
"%s Scheduled PTSR polling on FN=%d, TS=%d\n",
name(), poll_fn, poll_ts);
/* } else {
dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
new_dl_tbf->set_state(GPRS_RLCMAC_FLOW);
tbf_assign_control_ts(new_dl_tbf);
// stop pending assignment timer
new_dl_tbf->stop_timer();
}
*/
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: msg assembled ok\n");
return msg;
}
struct msgb *gprs_rlcmac_tbf::create_dl_ts_recon(uint32_t fn, uint8_t ts)
{
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: GPRS_RLCMAC_RECONFIGURING: preparing msg\n");
struct msgb *msg;
struct gprs_rlcmac_dl_tbf *new_dl_tbf = NULL;
int poll_ass_dl = 1;
unsigned int rrbp = 0;
uint32_t new_poll_fn = 0;
int rc;
bool old_tfi_is_valid = is_tfi_assigned();
if (direction == GPRS_RLCMAC_DL_TBF && !is_control_ts(ts)) {
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: Cannot poll for downlink "
"assigment, because MS cannot reply. (TS=%d, "
"first common TS=%d)\n", ts,
first_common_ts);
poll_ass_dl = 0;
}
if (poll_ass_dl) {
if (poll_state == GPRS_RLCMAC_POLL_SCHED &&
ul_ass_state == GPRS_RLCMAC_UL_ASS_WAIT_ACK)
{
LOGP(DRLCMACUL, LOGL_DEBUG, "PTSR: Polling is already "
"scheduled for %s, so we must wait for the uplink "
"assignment...\n", tbf_name(this));
return NULL;
}
rc = check_polling(fn, ts, &new_poll_fn, &rrbp);
if (rc < 0) {
LOGP(DRLCMAC, LOGL_ERROR, "PTSR: check polling failed!\n");
return NULL;
}
}
/* on uplink TBF we get the downlink TBF to be assigned. */
if (direction == GPRS_RLCMAC_UL_TBF) {
gprs_rlcmac_ul_tbf *ul_tbf = as_ul_tbf(this);
/* be sure to check first, if contention resolution is done,
* otherwise we cannot send the assignment yet */
if (!ul_tbf->m_contention_resolution_done) {
LOGP(DRLCMAC, LOGL_DEBUG, "PTSR: Cannot assign DL TBF now, "
"because contention resolution is not "
"finished.\n");
return NULL;
}
}
if (ms())
new_dl_tbf = ms()->dl_tbf();
if (!new_dl_tbf) {
LOGP(DRLCMACDL, LOGL_ERROR, "PTSR: We have a schedule for downlink "
"assignment at %s, but there is no downlink "
"TBF\n", tbf_name(this));
dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
return NULL;
}
if (new_dl_tbf == as_dl_tbf(this))
LOGP(DRLCMAC, LOGL_DEBUG,
"PTSR: New and old TBF are the same %s\n", name());
if (old_tfi_is_valid && !new_dl_tbf->is_tlli_valid()) {
LOGP(DRLCMACDL, LOGL_ERROR,
"PTSR: The old TFI is not assigned and there is no "
"TLLI. Old TBF %s, new TBF %s\n",
name(), new_dl_tbf->name());
dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
return NULL;
}
new_dl_tbf->was_releasing = was_releasing;
msg = msgb_alloc(23, "rlcmac_dl_ts_rec");
if (!msg)
return NULL;
bitvec *ass_vec = bitvec_alloc(23);
if (!ass_vec) {
msgb_free(msg);
return NULL;
}
bitvec_unhex(ass_vec,
"2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
LOGP(DRLCMAC, LOGL_INFO, "PTSR: %s start Packet Downlink Assignment (PACCH)\n", tbf_name(new_dl_tbf));
RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t);
/*
Encoding::write_packet_downlink_assignment(mac_control_block,
old_tfi_is_valid, m_tfi, (direction == GPRS_RLCMAC_DL_TBF),
new_dl_tbf, poll_ass_dl, rrbp,
bts_data()->alpha, bts_data()->gamma, -1, 0,
is_egprs_enabled());
LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n");
encode_gsm_rlcmac_downlink(ass_vec, mac_control_block);
LOGPC(DCSN1, LOGL_NOTICE, "\n");
LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Downlink Assignment -------------------------\n");
*/
Encoding::write_packet_ts_reconfigure(mac_control_block, new_dl_tbf, new_poll_fn, rrbp, bts_data()->alpha, bts_data()->gamma, is_egprs_enabled());
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: +++++++++++++++++++++++++ TX : Packet TS Reconfigure +++++++++++++++++++++++++\n");
encode_gsm_rlcmac_downlink(ass_vec, mac_control_block);
LOGPC(DCSN1, LOGL_NOTICE, "\n");
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: _________________________ TX : Packet TS Reconfigure _________________________\n");
/*end diff*/
bitvec_pack(ass_vec, msgb_put(msg, 23));
bitvec_free(ass_vec);
talloc_free(mac_control_block);
if (poll_ass_dl) {
set_polling(new_poll_fn, ts);
if (new_dl_tbf->state_is(GPRS_RLCMAC_ASSIGN))
new_dl_tbf->set_state(GPRS_RLCMAC_WAIT_ASSIGN);
dl_ass_state = GPRS_RLCMAC_DL_ASS_WAIT_ACK;
LOGP(DRLCMACDL, LOGL_INFO,
"PTSR: %s Scheduled DL Assignment polling on FN=%d, TS=%d\n",
name(), poll_fn, poll_ts);
} else {
dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
new_dl_tbf->set_state(GPRS_RLCMAC_FLOW);
tbf_assign_control_ts(new_dl_tbf);
/* stop pending assignment timer */
new_dl_tbf->stop_timer();
}
LOGP(DRLCMAC, LOGL_NOTICE, "PTSR: msgb=%s\n", msgb_hexdump(msg));
return msg;
}

8
src/tbf.h
View File

@ -57,6 +57,12 @@ enum gprs_rlcmac_tbf_poll_state {
GPRS_RLCMAC_POLL_SCHED, /* a polling was scheduled */
};
enum gprs_rlcmac_tbf_dl_ts_recon_state {
GPRS_RLCMAC_DL_TS_RECON_NONE = 0,
GPRS_RLCMAC_DL_TS_RECON_SEND, /* send PTSR on next RTS */
GPRS_RLCMAC_DL_TS_RECON_WAIT_ACK, /* wait for PACKET CONTROL ACK */
};
enum gprs_rlcmac_tbf_dl_ass_state {
GPRS_RLCMAC_DL_ASS_NONE = 0,
GPRS_RLCMAC_DL_ASS_SEND_ASS, /* send downlink assignment on next RTS */
@ -105,8 +111,8 @@ struct gprs_rlcmac_tbf {
struct msgb *create_dl_ass(uint32_t fn, uint8_t ts);
struct msgb *create_ul_ass(uint32_t fn, uint8_t ts);
struct msgb *create_dl_ts_recon_exp(uint32_t fn, uint8_t ts);
struct msgb *create_dl_ts_recon(uint32_t fn, uint8_t ts);
GprsMs *ms() const;
void set_ms(GprsMs *ms);