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authorStefan Sperling <ssperling@sysmocom.de>2018-02-06 18:57:14 +0100
committerStefan Sperling <ssperling@sysmocom.de>2018-02-06 18:57:14 +0100
commit9992b07d41880acfc5c44775c5c04a8ac48ebbf7 (patch)
tree8cd9540dace8c1f827923a76fa5d7c0d7421393d /src/libcommon/acc_ramp.c
parentd26f6d402e43028df512527c3541b6d8da0dbf73 (diff)
move acc_ramp.c to libbsc
Diffstat (limited to 'src/libcommon/acc_ramp.c')
-rw-r--r--src/libcommon/acc_ramp.c177
1 files changed, 0 insertions, 177 deletions
diff --git a/src/libcommon/acc_ramp.c b/src/libcommon/acc_ramp.c
deleted file mode 100644
index 3f83d1e1d..000000000
--- a/src/libcommon/acc_ramp.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/* (C) 2018 Stefan Sperling <ssperling@sysmocom.de>
- *
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation; either version 3 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#include <assert.h>
-#include <strings.h>
-#include <errno.h>
-
-#include <osmocom/bsc/debug.h>
-#include <osmocom/bsc/acc_ramp.h>
-#include <osmocom/bsc/gsm_data.h>
-
-static void deny_all_accs(struct acc_ramp *acc_ramp)
-{
- LOGP(DRLL, LOGL_DEBUG, "(bts=%d) ACC RAMP: denying all Access Control Classes 0-9\n", acc_ramp->bts->nr);
- acc_ramp->barred_t2 = 0x03; /* ACC8, ACC9 barred */
- acc_ramp->barred_t3 = 0xff; /* ACC0 - ACC7 barred */
-}
-
-static void allow_all_accs(struct acc_ramp *acc_ramp)
-{
- LOGP(DRLL, LOGL_DEBUG, "(bts=%d) ACC RAMP: allowing all Access Control Classes 0-9\n", acc_ramp->bts->nr);
- acc_ramp->barred_t2 = 0x00; /* ACC8, ACC9 allowed */
- acc_ramp->barred_t3 = 0x00; /* ACC0 - ACC7 allowed */
-}
-
-static void allow_one_acc(struct acc_ramp *acc_ramp, unsigned int acc)
-{
- LOGP(DRLL, LOGL_DEBUG, "(bts=%d) ACC RAMP: allowing Access Control Class %u\n", acc_ramp->bts->nr, acc);
- assert(acc >= 0 && acc <= 9);
- if (acc == 8 || acc == 9)
- acc_ramp->barred_t2 &= ~(1 << (acc - 8));
- else
- acc_ramp->barred_t3 &= ~(1 << acc);
-}
-
-static unsigned int get_next_step_interval(struct acc_ramp *acc_ramp)
-{
- struct gsm_bts *bts = acc_ramp->bts;
-
- if (acc_ramp->step_interval_is_fixed)
- return acc_ramp->step_interval_sec;
-
- if (bts->chan_load_avg == 0) {
- acc_ramp->step_interval_sec = ACC_RAMP_STEP_INTERVAL_MIN;
- } else {
- /* Scale the step interval to current channel load average. */
- uint64_t load = (bts->chan_load_avg << 8); /* convert to fixed-point */
- acc_ramp->step_interval_sec = ((load * ACC_RAMP_STEP_INTERVAL_MAX) / 100) >> 8;
- if (acc_ramp->step_interval_sec < ACC_RAMP_STEP_SIZE_MIN)
- acc_ramp->step_interval_sec = ACC_RAMP_STEP_INTERVAL_MIN;
- else if (acc_ramp->step_interval_sec > ACC_RAMP_STEP_INTERVAL_MAX)
- acc_ramp->step_interval_sec = ACC_RAMP_STEP_INTERVAL_MAX;
- }
-
- LOGP(DRLL, LOGL_DEBUG, "(bts=%d) ACC RAMP: step interval set to %u sec based on %u%% load average\n",
- bts->nr, acc_ramp->step_interval_sec, bts->chan_load_avg);
- return acc_ramp->step_interval_sec;
-}
-
-static void update_bts_rach_control(struct acc_ramp *acc_ramp)
-{
- struct gsm_bts *bts = acc_ramp->bts;
- struct gsm_bts_trx *trx;
-
- /* Update RACH control parameters of this BTS. */
- bts->si_common.rach_control.t2 &= ~0x03;
- bts->si_common.rach_control.t2 |= acc_ramp_get_barred_t2(acc_ramp);
- bts->si_common.rach_control.t3 = acc_ramp_get_barred_t3(acc_ramp);
-
- /* Send updated system information to all TRX. */
- llist_for_each_entry_reverse(trx, &bts->trx_list, list)
- gsm_bts_trx_set_system_infos(trx);
-}
-
-static void do_ramping_step(void *data)
-{
- struct acc_ramp *acc_ramp = data;
- int i;
-
- /* Shortcut in case we only do one ramping step. */
- if (acc_ramp->step_size == ACC_RAMP_STEP_SIZE_MAX) {
- allow_all_accs(acc_ramp);
- return;
- }
-
- /* Allow 'step_size' ACCs, starting from ACC0. ACC9 will be allowed last. */
- for (i = 0; i < acc_ramp->step_size; i++) {
- int idx = ffs(acc_ramp->barred_t3);
- if (idx > 0) {
- /* one of ACC0-ACC7 is still bared */
- allow_one_acc(acc_ramp, idx - 1);
- } else {
- idx = ffs(acc_ramp->barred_t2);
- if (idx == 1 || idx == 2) {
- /* ACC8 or ACC9 is still barred */
- allow_one_acc(acc_ramp, idx - 1 + 8);
- } else {
- /* all ACCs are now allowed */
- break;
- }
- }
- }
-
-
- update_bts_rach_control(acc_ramp);
-
- /* If we have not allowed all ACCs yet, schedule another ramping step. */
- if (acc_ramp_get_barred_t2(acc_ramp) != 0x00 ||
- acc_ramp_get_barred_t3(acc_ramp) != 0x00)
- osmo_timer_schedule(&acc_ramp->step_timer, get_next_step_interval(acc_ramp), 0);
-}
-
-void acc_ramp_init(struct acc_ramp *acc_ramp, struct gsm_bts *bts)
-{
- acc_ramp->bts = bts;
- allow_all_accs(acc_ramp);
- acc_ramp->step_size = ACC_RAMP_STEP_SIZE_DEFAULT;
- acc_ramp->step_interval_sec = ACC_RAMP_STEP_INTERVAL_DEFAULT;
- acc_ramp->step_interval_is_fixed = false;
- osmo_timer_setup(&acc_ramp->step_timer, do_ramping_step, acc_ramp);
-}
-
-int acc_ramp_set_step_size(struct acc_ramp *acc_ramp, enum acc_ramp_step_size step_size)
-{
- if (step_size < ACC_RAMP_STEP_SIZE_MIN || step_size > ACC_RAMP_STEP_SIZE_MAX)
- return -ERANGE;
-
- acc_ramp->step_size = step_size;
- return 0;
-}
-
-int acc_ramp_set_step_interval(struct acc_ramp *acc_ramp, unsigned int step_interval)
-{
- if (step_interval < ACC_RAMP_STEP_INTERVAL_MIN || step_interval > ACC_RAMP_STEP_INTERVAL_MAX)
- return -ERANGE;
-
- acc_ramp->step_interval_sec = step_interval;
- acc_ramp->step_interval_is_fixed = true;
- return 0;
-}
-
-void acc_ramp_set_step_interval_dynamic(struct acc_ramp *acc_ramp)
-{
- acc_ramp->step_interval_is_fixed = false;
-}
-
-void acc_ramp_start(struct acc_ramp *acc_ramp)
-{
- /* Abort any previously running ramping process. */
- acc_ramp_abort(acc_ramp);
-
- /* Set all ACCs to denied and start ramping up. */
- deny_all_accs(acc_ramp);
- do_ramping_step(acc_ramp);
-}
-
-void acc_ramp_abort(struct acc_ramp *acc_ramp)
-{
- if (osmo_timer_pending(&acc_ramp->step_timer))
- osmo_timer_del(&acc_ramp->step_timer);
-}