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replace dl_ass_state with osmocom FSM 

Related: OS#2709
Change-Id: Ia33418478e17986a316ffda48b091030f53fa371
changes/60/25060/3
Pau Espin 2021-07-27 17:33:07 +02:00
parent 432d4f3b89
commit 49a2f404e8
16 changed files with 100488 additions and 229 deletions
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2
src/Makefile.am
View File

@ -62,6 +62,7 @@ libgprs_la_SOURCES = \
tbf_ul.cpp \
tbf_ul_ass_fsm.c \
tbf_dl.cpp \
tbf_dl_ass_fsm.c \
bts.cpp \
bts_pch_timer.c \
pdch.cpp \
@ -103,6 +104,7 @@ noinst_HEADERS = \
tbf_ul.h \
tbf_ul_ass_fsm.h \
tbf_dl.h \
tbf_dl_ass_fsm.h \
bts.h \
bts_pch_timer.h \
pdch.h \

6
src/encoding.cpp
View File

@ -708,11 +708,11 @@ void write_packet_uplink_assignment(RlcMacDownlink_t *block, uint8_t old_tfi,
/* Generate Packet Downlink Assignment as per 3GPP TS 44.060, section 11.2.7.
* NOTE: 'block' is expected to be zero-initialized by the caller. */
void Encoding::write_packet_downlink_assignment(RlcMacDownlink_t * block,
void write_packet_downlink_assignment(RlcMacDownlink_t * block,
bool old_tfi_is_valid, uint8_t old_tfi, uint8_t old_downlink,
const struct gprs_rlcmac_dl_tbf *tbf, uint8_t poll, uint8_t rrbp,
uint8_t alpha, uint8_t gamma, int8_t ta_idx,
uint8_t ta_ts, bool use_egprs)
uint8_t ta_ts, bool use_egprs, uint8_t control_ack)
{
PDA_AdditionsR99_t *pda_r99;
@ -739,7 +739,7 @@ void Encoding::write_packet_downlink_assignment(RlcMacDownlink_t * block,
block->u.Packet_Downlink_Assignment.MAC_MODE = 0x0; // Dynamic Allocation
block->u.Packet_Downlink_Assignment.RLC_MODE = RLC_MODE_ACKNOWLEDGED;
block->u.Packet_Downlink_Assignment.CONTROL_ACK = tbf->was_releasing; // NW establishes no new DL TBF for the MS with running timer T3192
block->u.Packet_Downlink_Assignment.CONTROL_ACK = control_ack; // NW establishes no new DL TBF for the MS with running timer T3192
block->u.Packet_Downlink_Assignment.TIMESLOT_ALLOCATION = 0; // timeslot(s)
for (tn = 0; tn < 8; tn++) {
if (tbf->pdch[tn])

13
src/encoding.h
View File

@ -63,12 +63,6 @@ public:
uint8_t t3142
);
static void write_packet_downlink_assignment(RlcMacDownlink_t * block,
bool old_tfi_is_valid, uint8_t old_tfi, uint8_t old_downlink,
const struct gprs_rlcmac_dl_tbf *tbf, uint8_t poll, uint8_t rrbp,
uint8_t alpha, uint8_t gamma,
int8_t ta_idx, uint8_t ta_ts, bool use_egprs);
static void encode_rbb(const char *show_rbb, uint8_t *rbb);
static void write_packet_uplink_ack(
@ -118,6 +112,13 @@ void write_packet_uplink_assignment(RlcMacDownlink_t *block, uint8_t old_tfi,
uint8_t rrbp, uint8_t alpha, uint8_t gamma, int8_t ta_idx,
bool use_egprs);
void write_packet_downlink_assignment(RlcMacDownlink_t * block, bool old_tfi_is_valid,
uint8_t old_tfi, uint8_t old_downlink,
const struct gprs_rlcmac_dl_tbf *tbf, uint8_t poll,
uint8_t rrbp, uint8_t alpha, uint8_t gamma,
int8_t ta_idx, uint8_t ta_ts, bool use_egprs,
uint8_t control_ack);
void write_packet_neighbour_cell_data(RlcMacDownlink_t *block,
bool tfi_is_dl, uint8_t tfi, uint8_t container_id,
uint8_t container_idx, PNCDContainer_t *container);

8
src/gprs_rlcmac_sched.cpp
View File

@ -56,7 +56,7 @@ static void get_ctrl_msg_tbf_candidates(const struct gprs_rlcmac_pdch *pdch,
continue;
if (ul_tbf->ul_ack_state_is(GPRS_RLCMAC_UL_ACK_SEND_ACK))
tbf_cand->ul_ack = ul_tbf;
if (ul_tbf->dl_ass_state_is(GPRS_RLCMAC_DL_ASS_SEND_ASS))
if (tbf_dl_ass_rts(ul_tbf))
tbf_cand->dl_ass = ul_tbf;
if (tbf_ul_ass_rts(ul_tbf))
tbf_cand->ul_ass = ul_tbf;
@ -72,7 +72,7 @@ states? */
/* this trx, this ts */
if (!dl_tbf->is_control_ts(pdch->ts_no))
continue;
if (dl_tbf->dl_ass_state_is(GPRS_RLCMAC_DL_ASS_SEND_ASS))
if (tbf_dl_ass_rts(dl_tbf))
tbf_cand->dl_ass = dl_tbf;
if (tbf_ul_ass_rts(dl_tbf))
tbf_cand->ul_ass = dl_tbf;
@ -171,7 +171,7 @@ static struct msgb *sched_select_ctrl_msg(struct gprs_rlcmac_pdch *pdch, uint32_
else if (tbf == tbfs->ul_ass && tbf->direction == GPRS_RLCMAC_DL_TBF)
msg = tbf_ul_ass_create_rlcmac_msg(tbfs->ul_ass, fn, ts);
else if (tbf == tbfs->dl_ass && tbf->direction == GPRS_RLCMAC_UL_TBF)
msg = tbfs->dl_ass->create_dl_ass(fn, ts);
msg = tbf_dl_ass_create_rlcmac_msg(tbfs->dl_ass, fn, ts);
else if (tbf == tbfs->ul_ack)
msg = tbfs->ul_ack->create_ul_ack(fn, ts);
else if (tbf == tbfs->nacc) {
@ -196,7 +196,7 @@ static struct msgb *sched_select_ctrl_msg(struct gprs_rlcmac_pdch *pdch, uint32_
*/
if (tbfs->dl_ass) {
tbf = tbfs->dl_ass;
msg = tbfs->dl_ass->create_dl_ass(fn, ts);
msg = tbf_dl_ass_create_rlcmac_msg(tbfs->dl_ass, fn, ts);
} else if (tbfs->ul_ass) {
tbf = tbfs->ul_ass;
msg = tbf_ul_ass_create_rlcmac_msg(tbfs->ul_ass, fn, ts);

4
src/pdch.cpp
View File

@ -352,11 +352,11 @@ void gprs_rlcmac_pdch::rcv_control_ack(Packet_Control_Acknowledgement_t *packet,
tbf_free(tbf);
return;
}
if (tbf->dl_ass_state_is(GPRS_RLCMAC_DL_ASS_WAIT_ACK)) {
if (tbf->dl_ass_state_is(TBF_DL_ASS_WAIT_ACK)) {
LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] DOWNLINK ASSIGNED\n");
/* reset N3105 */
tbf->n_reset(N3105);
TBF_SET_ASS_STATE_DL(tbf, GPRS_RLCMAC_DL_ASS_NONE);
osmo_fsm_inst_dispatch(tbf->dl_ass_fsm.fi, TBF_DL_ASS_EV_RX_ASS_CTRL_ACK, NULL);
new_tbf = ms_dl_tbf(ms);
if (!new_tbf) {

131
src/tbf.cpp
View File

@ -61,13 +61,6 @@ unsigned int next_tbf_ctr_group_id = 0; /* Incrementing group id */
static void tbf_timer_cb(void *_tbf);
const struct value_string gprs_rlcmac_tbf_dl_ass_state_names[] = {
OSMO_VALUE_STRING(GPRS_RLCMAC_DL_ASS_NONE),
OSMO_VALUE_STRING(GPRS_RLCMAC_DL_ASS_SEND_ASS),
OSMO_VALUE_STRING(GPRS_RLCMAC_DL_ASS_WAIT_ACK),
{ 0, NULL }
};
const struct value_string gprs_rlcmac_tbf_ul_ack_state_names[] = {
OSMO_VALUE_STRING(GPRS_RLCMAC_UL_ACK_NONE),
OSMO_VALUE_STRING(GPRS_RLCMAC_UL_ACK_SEND_ACK), /* send acknowledge on next RTS */
@ -117,14 +110,12 @@ gprs_rlcmac_tbf::gprs_rlcmac_tbf(struct gprs_rlcmac_bts *bts_, GprsMs *ms, gprs_
control_ts(0xff),
fT(0),
num_fT_exp(0),
was_releasing(0),
upgrade_to_multislot(0),
bts(bts_),
m_tfi(0),
m_created_ts(0),
m_ctrs(NULL),
m_ms(ms),
dl_ass_state(GPRS_RLCMAC_DL_ASS_NONE),
ul_ack_state(GPRS_RLCMAC_UL_ACK_NONE),
m_egprs_enabled(false)
{
@ -147,6 +138,9 @@ gprs_rlcmac_tbf::gprs_rlcmac_tbf(struct gprs_rlcmac_bts *bts_, GprsMs *ms, gprs_
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);
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);
m_rlc.init();
m_llc.init();
@ -162,6 +156,8 @@ gprs_rlcmac_tbf::~gprs_rlcmac_tbf()
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);
}
@ -576,8 +572,6 @@ void gprs_rlcmac_tbf::set_polling(uint32_t new_poll_fn, uint8_t ts, enum pdch_ul
chan, new_poll_fn, ts);
break;
case PDCH_ULC_POLL_DL_ASS:
dl_ass_state = GPRS_RLCMAC_DL_ASS_WAIT_ACK;
LOGPTBFDL(this, LOGL_INFO, "Scheduled DL Assignment polling on %s (FN=%d, TS=%d)\n",
chan, new_poll_fn, ts);
break;
@ -635,14 +629,13 @@ void gprs_rlcmac_tbf::poll_timeout(struct gprs_rlcmac_pdch *pdch, uint32_t poll_
}
/* 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);
} else if (dl_ass_state == GPRS_RLCMAC_DL_ASS_WAIT_ACK) {
} else if (dl_ass_state_is(TBF_DL_ASS_WAIT_ACK)) {
if (!(state_fsm.state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS))) {
LOGPTBF(this, LOGL_NOTICE,
"Timeout for polling PACKET CONTROL ACK for PACKET DOWNLINK ASSIGNMENT: %s\n",
tbf_rlcmac_diag(this));
state_fsm.state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS);
}
dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
bts_do_rate_ctr_inc(bts, CTR_RLC_ASS_TIMEDOUT);
bts_do_rate_ctr_inc(bts, CTR_PDA_POLL_TIMEDOUT);
if (n_inc(N3105)) {
@ -651,8 +644,8 @@ void gprs_rlcmac_tbf::poll_timeout(struct gprs_rlcmac_pdch *pdch, uint32_t poll_
bts_do_rate_ctr_inc(bts, CTR_PDA_POLL_FAILED);
return;
}
/* reschedule DL assignment */
dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS;
/* 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);
} else if (m_ms->nacc && m_ms->nacc->fi->state == NACC_ST_WAIT_CELL_CHG_CONTINUE_ACK &&
m_ms->nacc->continue_poll_fn == poll_fn && m_ms->nacc->continue_poll_ts == pdch->ts_no) {
/* Timeout waiting for CTRL ACK acking Pkt Cell Change Continue */
@ -794,103 +787,6 @@ void gprs_rlcmac_tbf::handle_timeout()
}
}
struct msgb *gprs_rlcmac_tbf::create_dl_ass(uint32_t fn, uint8_t ts)
{
struct msgb *msg;
struct gprs_rlcmac_dl_tbf *new_dl_tbf = NULL;
RlcMacDownlink_t *mac_control_block = NULL;
const 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();
/* We only use this function in control TS (PACCH) so that MS can always answer the poll */
OSMO_ASSERT(is_control_ts(ts));
if (ul_ass_state_is(TBF_UL_ASS_WAIT_ACK))
{
LOGPTBF(this, LOGL_DEBUG,
"Polling is already scheduled, so we must wait for the uplink assignment...\n");
return NULL;
}
rc = check_polling(fn, ts, &new_poll_fn, &rrbp);
if (rc < 0)
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 (3GPP TS 44.060 sec 7.1.3.1) */
if (!ul_tbf->m_contention_resolution_done) {
LOGPTBF(this, LOGL_DEBUG,
"Cannot assign DL TBF now, because contention resolution is not finished.\n");
return NULL;
}
}
if (ms())
new_dl_tbf = ms_dl_tbf(ms());
if (!new_dl_tbf) {
LOGPTBFDL(this, LOGL_ERROR,
"We have a schedule for downlink assignment, but there is no downlink TBF\n");
dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
return NULL;
}
if (new_dl_tbf == as_dl_tbf(this))
LOGPTBF(this, LOGL_DEBUG, "New and old TBF are the same.\n");
if (old_tfi_is_valid && !new_dl_tbf->is_tlli_valid()) {
LOGPTBF(this, LOGL_ERROR,
"The old TFI is not assigned and there is no TLLI. New TBF %s\n",
new_dl_tbf->name());
dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
return NULL;
}
new_dl_tbf->was_releasing = was_releasing;
msg = msgb_alloc(GSM_MACBLOCK_LEN, "rlcmac_dl_ass");
if (!msg)
return NULL;
/* Initialize a bit vector that uses allocated msgb as the data buffer.
* Old G++ does not support non-trivial designated initializers. Sigh. */
struct bitvec bv = { };
bv.data = msgb_put(msg, GSM_MACBLOCK_LEN);
bv.data_len = GSM_MACBLOCK_LEN;
bitvec_unhex(&bv, DUMMY_VEC);
LOGPTBF(new_dl_tbf, LOGL_INFO, "start Packet Downlink Assignment (PACCH)\n");
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_get_ms_pwr_alpha(new_dl_tbf->bts), the_pcu->vty.gamma, -1, 0,
is_egprs_enabled());
LOGP(DTBF, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n");
rc = encode_gsm_rlcmac_downlink(&bv, mac_control_block);
if (rc < 0) {
LOGP(DTBF, LOGL_ERROR, "Encoding of Packet Downlink Ass failed (%d)\n", rc);
goto free_ret;
}
LOGP(DTBF, LOGL_DEBUG, "------------------------- TX : Packet Downlink Assignment -------------------------\n");
bts_do_rate_ctr_inc(bts, CTR_PKT_DL_ASSIGNMENT);
set_polling(new_poll_fn, ts, PDCH_ULC_POLL_DL_ASS);
talloc_free(mac_control_block);
return msg;
free_ret:
talloc_free(mac_control_block);
msgb_free(msg);
return NULL;
}
int gprs_rlcmac_tbf::establish_dl_tbf_on_pacch()
{
struct gprs_rlcmac_dl_tbf *new_tbf = NULL;
@ -939,6 +835,7 @@ void tbf_update_state_fsm_name(struct gprs_rlcmac_tbf *tbf)
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);
}
void gprs_rlcmac_tbf::rotate_in_list()
@ -1007,6 +904,11 @@ 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;
@ -1086,6 +988,11 @@ void tbf_poll_timeout(struct gprs_rlcmac_tbf *tbf, struct gprs_rlcmac_pdch *pdch
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);
}
const char* tbf_rlcmac_diag(const struct gprs_rlcmac_tbf *tbf)
{
static char buf[256];

35
src/tbf.h
View File

@ -49,6 +49,7 @@ extern "C" {
#include <pdch_ul_controller.h>
#include <tbf_fsm.h>
#include <tbf_ul_ass_fsm.h>
#include <tbf_dl_ass_fsm.h>
#ifdef __cplusplus
}
#endif
@ -57,14 +58,6 @@ extern "C" {
* TBF instance
*/
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 */
GPRS_RLCMAC_DL_ASS_WAIT_ACK, /* wait for PACKET CONTROL ACK */
};
extern const struct value_string gprs_rlcmac_tbf_dl_ass_state_names[];
enum gprs_rlcmac_tbf_ul_ack_state {
GPRS_RLCMAC_UL_ACK_NONE = 0,
GPRS_RLCMAC_UL_ACK_SEND_ACK, /* send acknowledge on next RTS */
@ -142,8 +135,6 @@ enum tbf_counters { /* TBF counters from 3GPP TS 44.060 §13.4 */
#define GPRS_RLCMAC_FLAG_TO_MASK 0xf0 /* timeout bits */
#define T_START(tbf, t, T, r, f) tbf->t_start(t, T, r, f, __FILE__, __LINE__)
#define TBF_SET_ASS_STATE_DL(t, st) do { t->set_ass_state_dl(st, __FILE__, __LINE__); } while(0)
#define TBF_SET_ACK_STATE(t, st) do { t->set_ack_state(st, __FILE__, __LINE__); } while(0)
#ifdef __cplusplus
@ -153,6 +144,7 @@ struct gprs_rlcmac_tbf;
const char *tbf_name(const struct gprs_rlcmac_tbf *tbf);
enum tbf_fsm_states tbf_state(const struct gprs_rlcmac_tbf *tbf);
struct osmo_fsm_inst *tbf_ul_ass_fi(const struct gprs_rlcmac_tbf *tbf);
struct osmo_fsm_inst *tbf_dl_ass_fi(const struct gprs_rlcmac_tbf *tbf);
enum gprs_rlcmac_tbf_direction tbf_direction(const struct gprs_rlcmac_tbf *tbf);
void tbf_set_ms(struct gprs_rlcmac_tbf *tbf, struct GprsMs *ms);
struct llist_head *tbf_ms_list(struct gprs_rlcmac_tbf *tbf);
@ -173,6 +165,7 @@ void tbf_set_polling(struct gprs_rlcmac_tbf *tbf, uint32_t new_poll_fn, uint8_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);
void tbf_update_state_fsm_name(struct gprs_rlcmac_tbf *tbf);
const char* tbf_rlcmac_diag(const struct gprs_rlcmac_tbf *tbf);
bool tbf_is_control_ts(const struct gprs_rlcmac_tbf *tbf, uint8_t ts);
#ifdef __cplusplus
}
#endif
@ -188,10 +181,9 @@ struct gprs_rlcmac_tbf {
int setup(int8_t use_trx, bool single_slot);
bool state_is(enum tbf_fsm_states rhs) const;
bool state_is_not(enum tbf_fsm_states rhs) const;
bool dl_ass_state_is(enum gprs_rlcmac_tbf_dl_ass_state rhs) const;
bool dl_ass_state_is(enum tbf_dl_ass_fsm_states rhs) const;
bool ul_ass_state_is(enum tbf_ul_ass_fsm_states rhs) const;
bool ul_ack_state_is(enum gprs_rlcmac_tbf_ul_ack_state rhs) const;
void set_ass_state_dl(enum gprs_rlcmac_tbf_dl_ass_state new_state, const char *file, int line);
void set_ack_state(enum gprs_rlcmac_tbf_ul_ack_state new_state, const char *file, int line);
void poll_sched_set(const char *file, int line);
void poll_sched_unset(const char *file, int line);
@ -274,10 +266,6 @@ struct gprs_rlcmac_tbf {
Meas();
} meas;
/* Remember if the tbf was in wait_release state when we want to
* schedule a new dl assignment */
uint8_t was_releasing;
/* Can/should we upgrade this tbf to use multiple slots? */
uint8_t upgrade_to_multislot;
@ -294,6 +282,7 @@ struct gprs_rlcmac_tbf {
struct rate_ctr_group *m_ctrs;
struct tbf_fsm_ctx state_fsm;
struct tbf_ul_ass_fsm_ctx ul_ass_fsm;
struct tbf_ul_ass_fsm_ctx dl_ass_fsm;
struct llist_item m_ms_list;
struct llist_item m_trx_list;
@ -307,7 +296,6 @@ protected:
struct GprsMs *m_ms;
private:
void enable_egprs();
enum gprs_rlcmac_tbf_dl_ass_state dl_ass_state;
enum gprs_rlcmac_tbf_ul_ack_state ul_ack_state;
bool m_egprs_enabled;
struct osmo_timer_list Tarr[T_MAX];
@ -320,9 +308,9 @@ inline bool gprs_rlcmac_tbf::state_is(enum tbf_fsm_states rhs) const
return tbf_state(this) == rhs;
}
inline bool gprs_rlcmac_tbf::dl_ass_state_is(enum gprs_rlcmac_tbf_dl_ass_state rhs) const
inline bool gprs_rlcmac_tbf::dl_ass_state_is(enum tbf_dl_ass_fsm_states rhs) const
{
return dl_ass_state == rhs;
return tbf_dl_ass_fi(this)->state == rhs;
}
inline bool gprs_rlcmac_tbf::ul_ass_state_is(enum tbf_ul_ass_fsm_states rhs) const
@ -346,15 +334,6 @@ inline const char *gprs_rlcmac_tbf::state_name() const
return osmo_fsm_inst_state_name(state_fsm.fi);
}
inline void gprs_rlcmac_tbf::set_ass_state_dl(enum gprs_rlcmac_tbf_dl_ass_state new_state, const char *file, int line)
{
LOGPSRC(DTBF, LOGL_DEBUG, file, line, "%s changes DL ASS state from %s to %s\n",
tbf_name(this),
get_value_string(gprs_rlcmac_tbf_dl_ass_state_names, dl_ass_state),
get_value_string(gprs_rlcmac_tbf_dl_ass_state_names, new_state));
dl_ass_state = new_state;
}
inline void gprs_rlcmac_tbf::set_ack_state(enum gprs_rlcmac_tbf_ul_ack_state new_state, const char *file, int line)
{
LOGPSRC(DTBF, LOGL_DEBUG, file, line, "%s changes UL ACK state from %s to %s\n",

4
src/tbf_dl.cpp
View File

@ -607,8 +607,7 @@ void gprs_rlcmac_dl_tbf::trigger_ass(struct gprs_rlcmac_tbf *old_tbf)
/* check for downlink tbf: */
if (old_tbf) {
LOGPTBFDL(this, LOGL_DEBUG, "Send dowlink assignment on PACCH, because %s exists\n", old_tbf->name());
TBF_SET_ASS_STATE_DL(old_tbf, GPRS_RLCMAC_DL_ASS_SEND_ASS);
old_tbf->was_releasing = old_tbf->state_is(TBF_ST_WAIT_RELEASE);
osmo_fsm_inst_dispatch(old_tbf->dl_ass_fsm.fi, TBF_DL_ASS_EV_SCHED_ASS, NULL);
/* change state */
osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_ASSIGN_ADD_PACCH, NULL);
@ -618,7 +617,6 @@ void gprs_rlcmac_dl_tbf::trigger_ass(struct gprs_rlcmac_tbf *old_tbf)
} else {
LOGPTBFDL(this, LOGL_DEBUG, "Send dowlink assignment on PCH, no TBF exist (IMSI=%s)\n",
imsi());
was_releasing = state_is(TBF_ST_WAIT_RELEASE);
/* change state */
osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_ASSIGN_ADD_CCCH, NULL);

273
src/tbf_dl_ass_fsm.c Normal file
View File

@ -0,0 +1,273 @@
/* tbf_dl_ass_fsm.c
*
* Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
* Author: Pau Espin Pedrol <pespin@sysmocom.de>
*
* 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 <unistd.h>
#include <talloc.h>
#include <osmocom/core/bitvec.h>
#include <tbf_dl_ass_fsm.h>
#include <gprs_rlcmac.h>
#include <gprs_debug.h>
#include <gprs_ms.h>
#include <encoding.h>
#include <bts.h>
#include <tbf.h>
#include <tbf_ul.h>
#define X(s) (1 << (s))
const struct osmo_tdef_state_timeout tbf_dl_ass_fsm_timeouts[32] = {
[TBF_DL_ASS_NONE] = {},
[TBF_DL_ASS_SEND_ASS] = {},
[TBF_DL_ASS_WAIT_ACK] = {},
};
const struct value_string tbf_dl_ass_fsm_event_names[] = {
{ TBF_DL_ASS_EV_SCHED_ASS, "SCHED_ASS" },
{ TBF_DL_ASS_EV_CREATE_RLCMAC_MSG, "CREATE_RLCMAC_MSG" },
{ TBF_DL_ASS_EV_RX_ASS_CTRL_ACK, "RX_ASS_CTRL_ACK" },
{ TBF_DL_ASS_EV_ASS_POLL_TIMEOUT, "ASS_POLL_TIMEOUT" },
{ 0, NULL }
};
struct msgb *create_packet_dl_assign(const struct tbf_dl_ass_fsm_ctx *ctx,
const struct tbf_dl_ass_ev_create_rlcmac_msg_ctx *d)
{
struct msgb *msg;
struct gprs_rlcmac_dl_tbf *new_dl_tbf = NULL;
RlcMacDownlink_t *mac_control_block = NULL;
struct GprsMs *ms = tbf_ms(ctx->tbf);
const int poll_ass_dl = 1;
unsigned int rrbp = 0;
uint32_t new_poll_fn = 0;
int rc;
bool old_tfi_is_valid = tbf_is_tfi_assigned(ctx->tbf);
/* We only use this function in control TS (PACCH) so that MS can always answer the poll */
OSMO_ASSERT(tbf_is_control_ts(ctx->tbf, d->ts));
if (tbf_ul_ass_fi(ctx->tbf)->state == TBF_UL_ASS_WAIT_ACK)
{
LOGPTBF(ctx->tbf, LOGL_DEBUG,
"Polling is already scheduled, so we must wait for the uplink assignment...\n");
// FIXME: call tbf_dl_ass_fsm_state_chg(ctx->fi, TBF_DL_ASS_NONE); ?
return NULL;
}
rc = tbf_check_polling(ctx->tbf, d->fn, d->ts, &new_poll_fn, &rrbp);
if (rc < 0)
return NULL;
/* on uplink TBF we get the downlink TBF to be assigned. */
if (tbf_direction(ctx->tbf) == GPRS_RLCMAC_UL_TBF) {
struct gprs_rlcmac_ul_tbf *ul_tbf = as_ul_tbf(ctx->tbf);
/* be sure to check first, if contention resolution is done,
* otherwise we cannot send the assignment yet (3GPP TS 44.060 sec 7.1.3.1) */
if (!ul_tbf_contention_resolution_done(ul_tbf)) {
LOGPTBF(ctx->tbf, LOGL_DEBUG,
"Cannot assign DL TBF now, because contention resolution is not finished.\n");
// FIXME: call tbf_dl_ass_fsm_state_chg(ctx->fi, TBF_DL_ASS_NONE); ?
return NULL;
}
}
new_dl_tbf = ms_dl_tbf(ms);
if (!new_dl_tbf) {
LOGPTBF(ctx->tbf, LOGL_ERROR,
"We have a schedule for downlink assignment, but there is no downlink TBF\n");
tbf_dl_ass_fsm_state_chg(ctx->fi, TBF_DL_ASS_NONE);
return NULL;
}
if (new_dl_tbf == as_dl_tbf(ctx->tbf))
LOGPTBF(ctx->tbf, LOGL_DEBUG, "New and old TBF are the same.\n");
if (old_tfi_is_valid && ms_tlli(ms) == GSM_RESERVED_TMSI) {
LOGPTBF(ctx->tbf, LOGL_ERROR,
"The old TFI is not assigned and there is no TLLI. New TBF %s\n",
tbf_name((struct gprs_rlcmac_tbf *)new_dl_tbf));
tbf_dl_ass_fsm_state_chg(ctx->fi, TBF_DL_ASS_NONE);
return NULL;
}
msg = msgb_alloc(GSM_MACBLOCK_LEN, "rlcmac_dl_ass");
if (!msg)
return NULL;
/* Initialize a bit vector that uses allocated msgb as the data buffer. */
struct bitvec bv = {
.data = msgb_put(msg, GSM_MACBLOCK_LEN),
.data_len = GSM_MACBLOCK_LEN,
};
bitvec_unhex(&bv, DUMMY_VEC);
LOGPTBF((struct gprs_rlcmac_tbf *)new_dl_tbf, LOGL_INFO, "start Packet Downlink Assignment (PACCH)\n");
mac_control_block = (RlcMacDownlink_t *)talloc_zero(ctx->tbf, RlcMacDownlink_t);
write_packet_downlink_assignment(mac_control_block, old_tfi_is_valid,
tbf_tfi(ctx->tbf), (tbf_direction(ctx->tbf) == GPRS_RLCMAC_DL_TBF),
new_dl_tbf, poll_ass_dl, rrbp,
bts_get_ms_pwr_alpha(ms->bts), the_pcu->vty.gamma, -1, 0,
tbf_is_egprs_enabled(ctx->tbf), tbf_state(ctx->tbf) == TBF_ST_WAIT_RELEASE);
LOGP(DTBF, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n");
rc = encode_gsm_rlcmac_downlink(&bv, mac_control_block);
if (rc < 0) {
LOGP(DTBF, LOGL_ERROR, "Encoding of Packet Downlink Ass failed (%d)\n", rc);
goto free_ret;
}
LOGP(DTBF, LOGL_DEBUG, "------------------------- TX : Packet Downlink Assignment -------------------------\n");
bts_do_rate_ctr_inc(ms->bts, CTR_PKT_DL_ASSIGNMENT);
tbf_set_polling(ctx->tbf, new_poll_fn, d->ts, PDCH_ULC_POLL_DL_ASS);
talloc_free(mac_control_block);
return msg;
free_ret:
talloc_free(mac_control_block);
msgb_free(msg);
return NULL;
}
static void st_none_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
{
}
static void st_none(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
switch (event) {
case TBF_DL_ASS_EV_SCHED_ASS:
tbf_dl_ass_fsm_state_chg(fi, TBF_DL_ASS_SEND_ASS);
break;
default:
OSMO_ASSERT(0);
}
}
static void st_send_ass(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct tbf_dl_ass_fsm_ctx *ctx = (struct tbf_dl_ass_fsm_ctx *)fi->priv;
struct tbf_dl_ass_ev_create_rlcmac_msg_ctx *data_ctx;
switch (event) {
case TBF_DL_ASS_EV_CREATE_RLCMAC_MSG:
data_ctx = (struct tbf_dl_ass_ev_create_rlcmac_msg_ctx *)data;
data_ctx->msg = create_packet_dl_assign(ctx, data_ctx);
if (!data_ctx->msg)
return;
tbf_dl_ass_fsm_state_chg(fi, TBF_DL_ASS_WAIT_ACK);
break;
default:
OSMO_ASSERT(0);
}
}
static void st_wait_ack(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
switch (event) {
case TBF_DL_ASS_EV_RX_ASS_CTRL_ACK:
tbf_dl_ass_fsm_state_chg(fi, TBF_DL_ASS_NONE);
break;
case TBF_DL_ASS_EV_ASS_POLL_TIMEOUT:
/* Reschedule Pkt Dl Ass */
tbf_dl_ass_fsm_state_chg(fi, TBF_DL_ASS_SEND_ASS);
break;
default:
OSMO_ASSERT(0);
}
}
static int tbf_dl_ass_fsm_timer_cb(struct osmo_fsm_inst *fi)
{
struct tbf_dl_ass_fsm_ctx *ctx = (struct tbf_dl_ass_fsm_ctx *)fi->priv;
switch (fi->T) {
case -2000:
tbf_free(ctx->tbf);
break;
default:
OSMO_ASSERT(0);
}
return 0;
}
static struct osmo_fsm_state tbf_dl_ass_fsm_states[] = {
[TBF_DL_ASS_NONE] = {
.in_event_mask =
X(TBF_DL_ASS_EV_SCHED_ASS),
.out_state_mask =
X(TBF_DL_ASS_SEND_ASS),
.name = "NONE",
.action = st_none,
.onenter = st_none_on_enter,
},
[TBF_DL_ASS_SEND_ASS] = {
.in_event_mask = X(TBF_DL_ASS_EV_CREATE_RLCMAC_MSG),
.out_state_mask = X(TBF_DL_ASS_WAIT_ACK),
.name = "SEND_ASS",
.action = st_send_ass,
},
[TBF_DL_ASS_WAIT_ACK] = {
.in_event_mask =
X(TBF_DL_ASS_EV_RX_ASS_CTRL_ACK) |
X(TBF_DL_ASS_EV_ASS_POLL_TIMEOUT),
.out_state_mask =
X(TBF_DL_ASS_NONE) |
X(TBF_DL_ASS_SEND_ASS),
.name = "WAIT_ACK",
.action = st_wait_ack,
},
};
struct osmo_fsm tbf_dl_ass_fsm = {
.name = "DL_ASS_TBF",
.states = tbf_dl_ass_fsm_states,
.num_states = ARRAY_SIZE(tbf_dl_ass_fsm_states),
.timer_cb = tbf_dl_ass_fsm_timer_cb,
.log_subsys = DTBF,
.event_names = tbf_dl_ass_fsm_event_names,
};
static __attribute__((constructor)) void tbf_dl_ass_fsm_init(void)
{
OSMO_ASSERT(osmo_fsm_register(&tbf_dl_ass_fsm) == 0);
}
struct msgb *tbf_dl_ass_create_rlcmac_msg(const struct gprs_rlcmac_tbf* tbf, uint32_t fn, uint8_t ts)
{
int rc;
struct tbf_dl_ass_ev_create_rlcmac_msg_ctx data_ctx = {
.fn = fn,
.ts = ts,
.msg = NULL,
};
rc = osmo_fsm_inst_dispatch(tbf_dl_ass_fi(tbf), TBF_DL_ASS_EV_CREATE_RLCMAC_MSG, &data_ctx);
if (rc != 0 || !data_ctx.msg)
return NULL;
return data_ctx.msg;
}
bool tbf_dl_ass_rts(const struct gprs_rlcmac_tbf* tbf)
{
struct osmo_fsm_inst *fi = tbf_dl_ass_fi(tbf);
return fi->state == TBF_DL_ASS_SEND_ASS;
}

69
src/tbf_dl_ass_fsm.h Normal file
View File

@ -0,0 +1,69 @@
/* tbf_dl_ass_fsm.h
*
* Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
* Author: Pau Espin Pedrol <pespin@sysmocom.de>
*
* 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.
*/
#pragma once
#include <osmocom/core/fsm.h>
#include <osmocom/core/tdef.h>
#include <gprs_pcu.h>
struct gprs_rlcmac_tbf;
enum tbf_dl_ass_fsm_event {
TBF_DL_ASS_EV_SCHED_ASS, /* Tx Uplink Assignment is pending */
TBF_DL_ASS_EV_CREATE_RLCMAC_MSG, /* Scheduler wants to gen+Tx the Ass (rej): data=tbf_dl_ass_ev_create_rlcmac_msg_ctx */
TBF_DL_ASS_EV_RX_ASS_CTRL_ACK, /* Received CTRL ACK answering poll set on Pkt Dl Ass */
TBF_DL_ASS_EV_ASS_POLL_TIMEOUT, /* Pdch Ul Controller signals timeout for poll set on Pkt Dl Ass */
};
enum tbf_dl_ass_fsm_states {
TBF_DL_ASS_NONE = 0,
TBF_DL_ASS_SEND_ASS, /* send downlink assignment on next RTS */
TBF_DL_ASS_WAIT_ACK, /* wait for PACKET CONTROL ACK */
};
struct tbf_dl_ass_fsm_ctx {
struct osmo_fsm_inst *fi;
struct gprs_rlcmac_tbf* tbf; /* back pointer */
};
extern const struct osmo_tdef_state_timeout tbf_dl_ass_fsm_timeouts[32];
/* Transition to a state, using the T timer defined in tbf_dl_ass_fsm_timeouts.
* The actual timeout value is in turn obtained from conn->T_defs.
* Assumes local variable fi exists. */
#define tbf_dl_ass_fsm_state_chg(fi, NEXT_STATE) \
osmo_tdef_fsm_inst_state_chg(fi, NEXT_STATE, \
tbf_dl_ass_fsm_timeouts, \
the_pcu->T_defs, \
-1)
extern struct osmo_fsm tbf_dl_ass_fsm;
/* passed as data in TBF_DL_ASS_EV_CREATE_RLCMAC_MSG */
struct tbf_dl_ass_ev_create_rlcmac_msg_ctx {
uint32_t fn; /* FN where the created DL ctrl block is to be sent */
uint8_t ts; /* TS where the created DL ctrl block is to be sent */
struct msgb *msg; /* to be filled by FSM during event processing */
};
struct msgb *tbf_dl_ass_create_rlcmac_msg(const struct gprs_rlcmac_tbf* tbf, uint32_t fn, uint8_t ts);
bool tbf_dl_ass_rts(const struct gprs_rlcmac_tbf* tbf);

6
src/tbf_ul.cpp
View File

@ -839,3 +839,9 @@ void tbf_usf_timeout(struct gprs_rlcmac_ul_tbf *tbf)
{
tbf->usf_timeout();
}
bool ul_tbf_contention_resolution_done(const struct gprs_rlcmac_ul_tbf *tbf)
{
return tbf->m_contention_resolution_done;
}

1
src/tbf_ul.h
View File

@ -137,6 +137,7 @@ void update_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, int8_t ta_delta);
void set_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, uint8_t ta);
struct gprs_rlcmac_ul_tbf *as_ul_tbf(struct gprs_rlcmac_tbf *tbf);
void tbf_usf_timeout(struct gprs_rlcmac_ul_tbf *tbf);
bool ul_tbf_contention_resolution_done(const struct gprs_rlcmac_ul_tbf *tbf);
#define LOGPTBFUL(tbf, level, fmt, args...) LOGP(DTBFUL, level, "%s " fmt, tbf_name(tbf), ## args)
#ifdef __cplusplus

99798
tests/alloc/AllocTest.err
View File

File diff suppressed because it is too large Load Diff

6
tests/tbf/TbfTest.cpp
View File

@ -216,7 +216,7 @@ static gprs_rlcmac_dl_tbf *create_dl_tbf(struct gprs_rlcmac_bts *bts, uint8_t ms
check_tbf(dl_tbf);
/* "Establish" the DL TBF */
TBF_SET_ASS_STATE_DL(dl_tbf, GPRS_RLCMAC_DL_ASS_SEND_ASS);
osmo_fsm_inst_dispatch(dl_tbf->dl_ass_fsm.fi, TBF_DL_ASS_EV_SCHED_ASS, NULL);
osmo_fsm_inst_dispatch(dl_tbf->state_fsm.fi, TBF_EV_ASSIGN_ADD_CCCH, NULL);
osmo_fsm_inst_dispatch(dl_tbf->state_fsm.fi, TBF_EV_ASSIGN_ACK_PACCH, NULL);
dl_tbf->m_wait_confirm = 0;
@ -314,7 +314,6 @@ static void test_tbf_final_ack(enum test_tbf_final_ack_mode test_mode)
OSMO_ASSERT(new_tbf != dl_tbf);
OSMO_ASSERT(new_tbf->tfi() == 1);
check_tbf(dl_tbf);
TBF_SET_ASS_STATE_DL(dl_tbf, GPRS_RLCMAC_DL_ASS_NONE);
if (test_mode == TEST_MODE_REVERSE_FREE) {
ms_ref(ms);
tbf_free(new_tbf);
@ -407,7 +406,6 @@ static void test_tbf_delayed_release()
/* Clean up and ensure tbfs are in the correct state */
OSMO_ASSERT(dl_tbf->state_is(TBF_ST_WAIT_RELEASE));
TBF_SET_ASS_STATE_DL(dl_tbf, GPRS_RLCMAC_DL_ASS_NONE);
check_tbf(dl_tbf);
tbf_free(dl_tbf);
TALLOC_FREE(the_pcu);
@ -2751,7 +2749,6 @@ static void establish_and_use_egprs_dl_tbf(struct gprs_rlcmac_bts *bts, int mcs)
/* Clean up and ensure tbfs are in the correct state */
OSMO_ASSERT(dl_tbf->state_is(TBF_ST_WAIT_RELEASE));
TBF_SET_ASS_STATE_DL(dl_tbf, GPRS_RLCMAC_DL_ASS_NONE);
check_tbf(dl_tbf);
tbf_free(dl_tbf);
}
@ -2800,7 +2797,6 @@ static void tbf_cleanup(gprs_rlcmac_dl_tbf *dl_tbf)
/* Clean up and ensure tbfs are in the correct state */
OSMO_ASSERT(dl_tbf->state_is(TBF_ST_WAIT_RELEASE));
TBF_SET_ASS_STATE_DL(dl_tbf, GPRS_RLCMAC_DL_ASS_NONE);
check_tbf(dl_tbf);
tbf_free(dl_tbf);

357
tests/tbf/TbfTest.err
View File

File diff suppressed because it is too large Load Diff

4
tests/types/TypesTest.err
View File

@ -1,16 +1,19 @@
MS(TLLI=0xffffffff, IMSI=, TA=220, 1/0,) Allocating DL TBF
TBF{NULL}: Allocated
UL_ASS_TBF{NONE}: Allocated
DL_ASS_TBF{NONE}: Allocated
TBF(TFI=0 TLLI=0xffffffff DIR=DL STATE=NULL) Setting Control TS 2
TBF(TFI=0 TLLI=0xffffffff DIR=DL STATE=NULL) Allocated: trx = 0, ul_slots = 04, dl_slots = 04
MS(TLLI=0xffffffff, IMSI=, TA=220, 1/0,) Allocating UL TBF
TBF{NULL}: Allocated
UL_ASS_TBF{NONE}: Allocated
DL_ASS_TBF{NONE}: Allocated
TBF(TFI=0 TLLI=0xffffffff DIR=UL STATE=NULL) Setting Control TS 4
TBF(TFI=0 TLLI=0xffffffff DIR=UL STATE=NULL) Allocated: trx = 0, ul_slots = 10, dl_slots = 00
MS(TLLI=0xffffffff, IMSI=, TA=220, 1/1,) Allocating UL TBF
TBF{NULL}: Allocated
UL_ASS_TBF{NONE}: Allocated
DL_ASS_TBF{NONE}: Allocated
TBF(TFI=0 TLLI=0xffffffff DIR=UL STATE=NULL EGPRS) Setting Control TS 1
TBF(TFI=0 TLLI=0xffffffff DIR=UL STATE=NULL EGPRS) Allocated: trx = 0, ul_slots = 02, dl_slots = 00
TBF(TFI=0 TLLI=0xffffffff DIR=UL STATE=NULL EGPRS) setting EGPRS UL window size to 64, base(64) slots(1) ws_pdch(0)
@ -18,6 +21,7 @@ TBF(TFI=0 TLLI=0xffffffff DIR=UL STATE=NULL EGPRS) setting EGPRS UL window size
MS(TLLI=0xffffffff, IMSI=, TA=220, 1/1,) Allocating UL TBF
TBF{NULL}: Allocated
UL_ASS_TBF{NONE}: Allocated
DL_ASS_TBF{NONE}: Allocated
TBF(TFI=0 TLLI=0xffffffff DIR=UL STATE=NULL EGPRS) Setting Control TS 4
TBF(TFI=0 TLLI=0xffffffff DIR=UL STATE=NULL EGPRS) Allocated: trx = 0, ul_slots = 10, dl_slots = 00
TBF(TFI=0 TLLI=0xffffffff DIR=UL STATE=NULL EGPRS) setting EGPRS UL window size to 64, base(64) slots(1) ws_pdch(0)