diff options
Diffstat (limited to 'src/osmo-bts-sysmo/misc/sysmobts_mgr_temp.c')
| -rw-r--r-- | src/osmo-bts-sysmo/misc/sysmobts_mgr_temp.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/src/osmo-bts-sysmo/misc/sysmobts_mgr_temp.c b/src/osmo-bts-sysmo/misc/sysmobts_mgr_temp.c new file mode 100644 index 00000000..dac226f5 --- /dev/null +++ b/src/osmo-bts-sysmo/misc/sysmobts_mgr_temp.c @@ -0,0 +1,228 @@ +/* Temperature control for SysmoBTS management daemon */ + +/* + * (C) 2014 by Holger Hans Peter Freyther + * + * 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 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 "misc/sysmobts_mgr.h" +#include "misc/sysmobts_misc.h" + +#include <osmo-bts/logging.h> + +#include <osmocom/core/timer.h> +#include <osmocom/core/utils.h> + +static struct sysmobts_mgr_instance *s_mgr; +static struct osmo_timer_list temp_ctrl_timer; + +static const struct value_string state_names[] = { + { STATE_NORMAL, "NORMAL" }, + { STATE_WARNING_HYST, "WARNING (HYST)" }, + { STATE_WARNING, "WARNING" }, + { STATE_CRITICAL, "CRITICAL" }, + { 0, NULL } +}; + +const char *sysmobts_mgr_temp_get_state(enum sysmobts_temp_state state) +{ + return get_value_string(state_names, state); +} + +static int next_state(enum sysmobts_temp_state current_state, int critical, int warning) +{ + int next_state = -1; + switch (current_state) { + case STATE_NORMAL: + if (critical) + next_state = STATE_CRITICAL; + else if (warning) + next_state = STATE_WARNING; + break; + case STATE_WARNING_HYST: + if (critical) + next_state = STATE_CRITICAL; + else if (warning) + next_state = STATE_WARNING; + else + next_state = STATE_NORMAL; + break; + case STATE_WARNING: + if (critical) + next_state = STATE_CRITICAL; + else if (!warning) + next_state = STATE_WARNING_HYST; + break; + case STATE_CRITICAL: + if (!critical && !warning) + next_state = STATE_WARNING; + break; + }; + + return next_state; +} + +/** + * Go back to normal! Undo everything we did in the other states. For + * reducint the transmit power, the question is if we should slowly set + * it back to normal, let the BTS slowly increase it.. or handle it here + * as well? + */ +static void execute_normal_act(struct sysmobts_mgr_instance *manager) +{ + LOGP(DTEMP, LOGL_NOTICE, "System is back to normal temperature.\n"); +} + +static void execute_warning_act(struct sysmobts_mgr_instance *manager) +{ + LOGP(DTEMP, LOGL_NOTICE, "System has reached temperature warning.\n"); +} + +static void execute_critical_act(struct sysmobts_mgr_instance *manager) +{ + LOGP(DTEMP, LOGL_NOTICE, "System has reached critical warning.\n"); + + /* switch off the PA */ + if (manager->action_crit & TEMP_ACT_PA_OFF) { + if (!is_sbts2050_master()) { + LOGP(DTEMP, LOGL_NOTICE, + "PA can only be switched-off on the master\n"); + } else if (sbts2050_uc_set_pa_power(0) != 0) { + LOGP(DTEMP, LOGL_ERROR, + "Failed to switch off the PA. Stop BTS?\n"); + } else { + LOGP(DTEMP, LOGL_NOTICE, + "Switched off the PA due temperature.\n"); + } + /* + * TODO: remember we switched off things so we could switch + * it back on. But we would need to make sure that the BTS + * will not transmit with full power at that time. This + * requires the control protocol. + */ + } +} + +static void sysmobts_mgr_temp_handle(struct sysmobts_mgr_instance *manager, + int critical, int warning) +{ + int new_state = next_state(manager->state, critical, warning); + + /* Nothing changed */ + if (new_state < 0) + return; + + LOGP(DTEMP, LOGL_NOTICE, "Moving from state %s to %s.\n", + get_value_string(state_names, manager->state), + get_value_string(state_names, new_state)); + manager->state = new_state; + switch (manager->state) { + case STATE_NORMAL: + execute_normal_act(manager); + break; + case STATE_WARNING_HYST: + /* do nothing? Maybe start to increase transmit power? */ + break; + case STATE_WARNING: + execute_warning_act(manager); + break; + case STATE_CRITICAL: + execute_critical_act(manager); + break; + }; +} + +static void temp_ctrl_check() +{ + int rc; + int warn_thresh_passed = 0; + int crit_thresh_passed = 0; + + LOGP(DTEMP, LOGL_DEBUG, "Going to check the temperature.\n"); + + /* Read the current digital temperature */ + rc = sysmobts_temp_get(SYSMOBTS_TEMP_DIGITAL, SYSMOBTS_TEMP_INPUT); + if (rc < 0) { + LOGP(DTEMP, LOGL_ERROR, + "Failed to read the digital temperature. rc=%d\n", rc); + warn_thresh_passed = crit_thresh_passed = 1; + } else { + int temp = rc / 1000; + if (temp > s_mgr->digital_limit.thresh_warn) + warn_thresh_passed = 1; + if (temp > s_mgr->digital_limit.thresh_crit) + crit_thresh_passed = 1; + LOGP(DTEMP, LOGL_DEBUG, "Digital temperature is: %d\n", temp); + } + + /* Read the current RF temperature */ + rc = sysmobts_temp_get(SYSMOBTS_TEMP_RF, SYSMOBTS_TEMP_INPUT); + if (rc < 0) { + LOGP(DTEMP, LOGL_ERROR, + "Failed to read the RF temperature. rc=%d\n", rc); + warn_thresh_passed = crit_thresh_passed = 1; + } else { + int temp = rc / 1000; + if (temp > s_mgr->rf_limit.thresh_warn) + warn_thresh_passed = 1; + if (temp > s_mgr->rf_limit.thresh_crit) + crit_thresh_passed = 1; + LOGP(DTEMP, LOGL_DEBUG, "RF temperature is: %d\n", temp); + } + + if (is_sbts2050_master()) { + int temp_pa, temp_board; + + rc = sbts2050_uc_check_temp(&temp_pa, &temp_board); + if (rc != 0) { + /* XXX what do here? */ + LOGP(DTEMP, LOGL_ERROR, + "Failed to read the temperature! Reboot?!\n"); + warn_thresh_passed = 1; + crit_thresh_passed = 1; + } else { + LOGP(DTEMP, LOGL_DEBUG, "SBTS2050 board(%d) PA(%d)\n", + temp_board, temp_pa); + if (temp_pa > s_mgr->pa_limit.thresh_warn) + warn_thresh_passed = 1; + if (temp_pa > s_mgr->pa_limit.thresh_crit) + crit_thresh_passed = 1; + if (temp_board > s_mgr->board_limit.thresh_warn) + warn_thresh_passed = 1; + if (temp_board > s_mgr->board_limit.thresh_crit) + crit_thresh_passed = 1; + } + } + + sysmobts_mgr_temp_handle(s_mgr, crit_thresh_passed, warn_thresh_passed); +} + +static void temp_ctrl_check_cb(void *unused) +{ + temp_ctrl_check(); + /* Check every two minutes? XXX make it configurable! */ + osmo_timer_schedule(&temp_ctrl_timer, 2 * 60, 0); +} + +int sysmobts_mgr_temp_init(struct sysmobts_mgr_instance *mgr) +{ + s_mgr = mgr; + temp_ctrl_timer.cb = temp_ctrl_check_cb; + temp_ctrl_check_cb(NULL); + return 0; +} |