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authorMax <msuraev@sysmocom.de>2018-02-19 18:00:38 +0100
committerNeels Hofmeyr <neels@hofmeyr.de>2018-02-27 22:27:53 +0100
commit321bf390d0ae41d2bce36433c468e410ae6fc840 (patch)
tree0bb0108446f5296978c4d6c5b7212bb52150be80
parent5e9f9a9773025060c70c11c2588f646d0fc5c7f1 (diff)
Simplify TS alloc: move slot assignment
Move into separate functions: * move timeslot reservation * move UL timeslot assignment * move DL timeslot assignment Change-Id: I64cf78c5cfc78664766f9769dd5cde632dab92b0 Related: OS#2282
-rw-r--r--src/gprs_rlcmac_ts_alloc.cpp115
-rw-r--r--src/mslot_class.c8
-rw-r--r--src/mslot_class.h1
-rw-r--r--tests/tbf/TbfTest.err2
4 files changed, 84 insertions, 42 deletions
diff --git a/src/gprs_rlcmac_ts_alloc.cpp b/src/gprs_rlcmac_ts_alloc.cpp
index f26b27c..4cc9539 100644
--- a/src/gprs_rlcmac_ts_alloc.cpp
+++ b/src/gprs_rlcmac_ts_alloc.cpp
@@ -812,6 +812,75 @@ static int allocate_usf(const gprs_rlcmac_trx *trx, int8_t first_common_ts, uint
return ul_slots;
}
+/*! Update MS' reserved timeslots
+ *
+ * \param[in,out] trx Pointer to TRX struct
+ * \param[in,out] ms_ Pointer to MS object
+ * \param[in] tbf_ Pointer to TBF struct
+ * \param[in] res_ul_slots Newly reserved UL slots
+ * \param[in] res_dl_slots Newly reserved DL slots
+ * \param[in] ul_slots available UL slots (for logging only)
+ * \param[in] dl_slots available DL slots (for logging only)
+ */
+static void update_ms_reserved_slots(gprs_rlcmac_trx *trx, GprsMs *ms, uint8_t res_ul_slots, uint8_t res_dl_slots,
+ uint8_t ul_slots, uint8_t dl_slots)
+{
+ char slot_info[9] = { 0 };
+
+ if (res_ul_slots == ms->reserved_ul_slots() && res_dl_slots == ms->reserved_dl_slots())
+ return;
+
+ /* The reserved slots have changed, update the MS */
+ ms->set_reserved_slots(trx, res_ul_slots, res_dl_slots);
+
+ ts_format(slot_info, dl_slots, ul_slots);
+ LOGP(DRLCMAC, LOGL_DEBUG, "- Reserved DL/UL slots: (TS=0)\"%s\"(TS=7)\n", slot_info);
+}
+
+/*! Assign given UL timeslots to UL TBF
+ *
+ * \param[in,out] ul_tbf Pointer to UL TBF struct
+ * \param[in,out] trx Pointer to TRX object
+ * \param[in] ul_slots Set of slots to be assigned
+ * \param[in] tfi selected TFI
+ * \param[in] usf selected USF
+ */
+static void assign_ul_tbf_slots(struct gprs_rlcmac_ul_tbf *ul_tbf, gprs_rlcmac_trx *trx, uint8_t ul_slots, int tfi,
+ int *usf)
+{
+ uint8_t ts;
+
+ for (ts = 0; ts < 8; ts++) {
+ if (!(ul_slots & (1 << ts)))
+ continue;
+
+ OSMO_ASSERT(usf[ts] >= 0);
+
+ LOGP(DRLCMAC, LOGL_DEBUG, "- Assigning UL TS %u\n", ts);
+ assign_uplink_tbf_usf(&trx->pdch[ts], ul_tbf, tfi, usf[ts]);
+ }
+}
+
+/*! Assign given DL timeslots to DL TBF
+ *
+ * \param[in,out] dl_tbf Pointer to DL TBF struct
+ * \param[in,out] trx Pointer to TRX object
+ * \param[in] ul_slots Set of slots to be assigned
+ * \param[in] tfi selected TFI
+ */
+static void assign_dl_tbf_slots(struct gprs_rlcmac_dl_tbf *dl_tbf, gprs_rlcmac_trx *trx, uint8_t dl_slots, int tfi)
+{
+ uint8_t ts;
+
+ for (ts = 0; ts < 8; ts++) {
+ if (!(dl_slots & (1 << ts)))
+ continue;
+
+ LOGP(DRLCMAC, LOGL_DEBUG, "- Assigning DL TS %u\n", ts);
+ assign_dlink_tbf(&trx->pdch[ts], dl_tbf, tfi);
+ }
+}
+
/*! Slot Allocation: Algorithm B
*
* Assign as many downlink slots as possible.
@@ -834,8 +903,6 @@ int alloc_algorithm_b(struct gprs_rlcmac_bts *bts, GprsMs *ms_, struct gprs_rlcm
int8_t first_common_ts;
uint8_t slotcount = 0;
uint8_t avail_count = 0, trx_no;
- char slot_info[9] = {0};
- int ts;
int first_ts = -1;
int usf[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
int rc;
@@ -927,50 +994,16 @@ int alloc_algorithm_b(struct gprs_rlcmac_bts *bts, GprsMs *ms_, struct gprs_rlcm
/* Step 4: Update MS and TBF and really allocate the resources */
- /* The reserved slots have changed, update the MS */
- if (reserved_ul_slots != ms->reserved_ul_slots() ||
- reserved_dl_slots != ms->reserved_dl_slots())
- {
- ms_->set_reserved_slots(trx,
- reserved_ul_slots, reserved_dl_slots);
-
- LOGP(DRLCMAC, LOGL_DEBUG,
- "- Reserved DL/UL slots: (TS=0)\"%s\"(TS=7)\n",
- set_flag_chars(set_flag_chars(set_flag_chars(slot_info,
- dl_slots, 'D', '.'),
- ul_slots, 'U'),
- ul_slots & dl_slots, 'C'));
- }
+ update_ms_reserved_slots(trx, ms_, reserved_ul_slots, reserved_dl_slots, ul_slots, dl_slots);
tbf_->trx = trx;
tbf_->first_common_ts = first_common_ts;
tbf_->first_ts = first_ts;
- if (tbf->direction == GPRS_RLCMAC_DL_TBF) {
- struct gprs_rlcmac_dl_tbf *dl_tbf = as_dl_tbf(tbf_);
- for (ts = 0; ts < 8; ts++) {
- if (!(dl_slots & (1 << ts)))
- continue;
-
- LOGP(DRLCMAC, LOGL_DEBUG, "- Assigning DL TS "
- "%d\n", ts);
- assign_dlink_tbf(&trx->pdch[ts], dl_tbf, tfi);
- }
- } else {
- struct gprs_rlcmac_ul_tbf *ul_tbf = as_ul_tbf(tbf_);
-
- for (ts = 0; ts < 8; ts++) {
- if (!(ul_slots & (1 << ts)))
- continue;
-
- OSMO_ASSERT(usf[ts] >= 0);
-
- LOGP(DRLCMAC, LOGL_DEBUG, "- Assigning UL TS "
- "%d\n", ts);
- assign_uplink_tbf_usf(&trx->pdch[ts], ul_tbf,
- tfi, usf[ts]);
- }
- }
+ if (tbf->direction == GPRS_RLCMAC_DL_TBF)
+ assign_dl_tbf_slots(as_dl_tbf(tbf_), trx, dl_slots, tfi);
+ else
+ assign_ul_tbf_slots(as_ul_tbf(tbf_), trx, ul_slots, tfi, usf);
bts->bts->tbf_alloc_algo_b();
diff --git a/src/mslot_class.c b/src/mslot_class.c
index d49d411..d403f00 100644
--- a/src/mslot_class.c
+++ b/src/mslot_class.c
@@ -23,6 +23,7 @@
#include <mslot_class.h>
#include <gprs_debug.h>
+#include <osmocom/core/bits.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/logging.h>
@@ -252,3 +253,10 @@ void masked_override_with(char *buf, uint8_t mask, char set_char)
if (mask & 1)
buf[i] = set_char;
}
+
+void ts_format(char *buf, uint8_t dl_mask, uint8_t ul_mask)
+{
+ snprintf(buf, 9, OSMO_BIT_SPEC, OSMO_BIT_PRINT_EX(dl_mask, 'D'));
+ masked_override_with(buf, ul_mask, 'U');
+ masked_override_with(buf, ul_mask & dl_mask, 'C');
+}
diff --git a/src/mslot_class.h b/src/mslot_class.h
index 97b865b..445455f 100644
--- a/src/mslot_class.h
+++ b/src/mslot_class.h
@@ -56,3 +56,4 @@ void mslot_fill_rx_mask(uint8_t mslot_class, uint8_t num_tx, uint8_t *rx_mask);
int8_t find_free_usf(uint8_t usf_map);
int8_t find_free_tfi(uint32_t tfi_map);
void masked_override_with(char *buf, uint8_t mask, char set_char);
+void ts_format(char *buf, uint8_t dl_mask, uint8_t ul_mask);
diff --git a/tests/tbf/TbfTest.err b/tests/tbf/TbfTest.err
index d046382..c899199 100644
--- a/tests/tbf/TbfTest.err
+++ b/tests/tbf/TbfTest.err
@@ -5921,7 +5921,7 @@ Slot Allocation (Algorithm B) for class 11
Rx=4 Tx=3 Sum Rx+Tx=5, Tta=3 Ttb=1, Tra=2 Trb=1, Type=1
- Selected DL slots: (TS=0)"..ddDd.."(TS=7), single
Using single slot at TS 4 for DL
-- Reserved DL/UL slots: (TS=0)"....C..."(TS=7)
+- Reserved DL/UL slots: (TS=0)"...DC..."(TS=7)
- Assigning DL TS 4
PDCH(TS 4, TRX 0): Attaching TBF(TFI=0 TLLI=0x00000000 DIR=DL STATE=NULL EGPRS), 1 TBFs, USFs = 00, TFIs = 00000001.
TBF(TFI=0 TLLI=0x00000000 DIR=DL STATE=NULL EGPRS) Setting Control TS 4