| 1 | /* $NetBSD: sysmon_envsys_events.c,v 1.118 2015/10/15 13:35:30 bouyer Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2007, 2008 Juan Romero Pardines. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | /* |
| 29 | * sysmon_envsys(9) events framework. |
| 30 | */ |
| 31 | |
| 32 | #include <sys/cdefs.h> |
| 33 | __KERNEL_RCSID(0, "$NetBSD: sysmon_envsys_events.c,v 1.118 2015/10/15 13:35:30 bouyer Exp $" ); |
| 34 | |
| 35 | #include <sys/param.h> |
| 36 | #include <sys/types.h> |
| 37 | #include <sys/conf.h> |
| 38 | #include <sys/errno.h> |
| 39 | #include <sys/kernel.h> |
| 40 | #include <sys/systm.h> |
| 41 | #include <sys/proc.h> |
| 42 | #include <sys/mutex.h> |
| 43 | #include <sys/kmem.h> |
| 44 | #include <sys/callout.h> |
| 45 | #include <sys/syslog.h> |
| 46 | |
| 47 | #include <dev/sysmon/sysmonvar.h> |
| 48 | #include <dev/sysmon/sysmon_envsysvar.h> |
| 49 | |
| 50 | struct sme_sensor_event { |
| 51 | int state; |
| 52 | int event; |
| 53 | }; |
| 54 | |
| 55 | static const struct sme_sensor_event sme_sensor_event[] = { |
| 56 | { ENVSYS_SVALID, PENVSYS_EVENT_NORMAL }, |
| 57 | { ENVSYS_SCRITOVER, PENVSYS_EVENT_CRITOVER }, |
| 58 | { ENVSYS_SCRITUNDER, PENVSYS_EVENT_CRITUNDER }, |
| 59 | { ENVSYS_SWARNOVER, PENVSYS_EVENT_WARNOVER }, |
| 60 | { ENVSYS_SWARNUNDER, PENVSYS_EVENT_WARNUNDER }, |
| 61 | { ENVSYS_BATTERY_CAPACITY_NORMAL, PENVSYS_EVENT_NORMAL }, |
| 62 | { ENVSYS_BATTERY_CAPACITY_WARNING, PENVSYS_EVENT_BATT_WARN }, |
| 63 | { ENVSYS_BATTERY_CAPACITY_CRITICAL, PENVSYS_EVENT_BATT_CRIT }, |
| 64 | { ENVSYS_BATTERY_CAPACITY_HIGH, PENVSYS_EVENT_BATT_HIGH }, |
| 65 | { ENVSYS_BATTERY_CAPACITY_MAX, PENVSYS_EVENT_BATT_MAX }, |
| 66 | { -1, -1 } |
| 67 | }; |
| 68 | |
| 69 | static const struct op_t { |
| 70 | const char *name; |
| 71 | enum envsys_lims idx; |
| 72 | uint32_t prop; |
| 73 | } limit_ops[] = { |
| 74 | /* Value-based limits */ |
| 75 | { "critical-max" , ENVSYS_LIM_CRITMAX, PROP_CRITMAX }, |
| 76 | { "warning-max" , ENVSYS_LIM_WARNMAX, PROP_WARNMAX }, |
| 77 | { "warning-min" , ENVSYS_LIM_WARNMIN, PROP_WARNMIN }, |
| 78 | { "critical-min" , ENVSYS_LIM_CRITMIN, PROP_CRITMIN }, |
| 79 | |
| 80 | /* %Capacity-based limits */ |
| 81 | { "maximum-capacity" , ENVSYS_LIM_CRITMAX, PROP_BATTMAX }, |
| 82 | { "high-capacity" , ENVSYS_LIM_WARNMAX, PROP_BATTHIGH }, |
| 83 | { "warning-capacity" , ENVSYS_LIM_WARNMIN, PROP_BATTWARN }, |
| 84 | { "critical-capacity" , ENVSYS_LIM_CRITMIN, PROP_BATTCAP }, |
| 85 | { NULL, 0, 0 } |
| 86 | }; |
| 87 | |
| 88 | static const struct ev_reg_t { |
| 89 | uint32_t crittype; |
| 90 | uint32_t powertype; |
| 91 | const char *name; |
| 92 | } reg_events[] = { |
| 93 | { ENVSYS_FMONCRITICAL, PENVSYS_EVENT_CRITICAL, "critical" }, |
| 94 | { ENVSYS_FMONSTCHANGED, PENVSYS_EVENT_STATE_CHANGED, "state-changed" }, |
| 95 | { ENVSYS_FMONLIMITS, PENVSYS_EVENT_LIMITS, "hw-range-limits" }, |
| 96 | { ENVSYS_FHAS_ENTROPY, PENVSYS_EVENT_NULL, "refresh-event" }, |
| 97 | { 0, 0, NULL } |
| 98 | }; |
| 99 | |
| 100 | static bool sysmon_low_power; |
| 101 | |
| 102 | #define SME_EVTIMO (SME_EVENTS_DEFTIMEOUT * hz) |
| 103 | |
| 104 | static bool sme_event_check_low_power(void); |
| 105 | static bool sme_battery_check(void); |
| 106 | static bool sme_battery_critical(envsys_data_t *); |
| 107 | static bool sme_acadapter_check(void); |
| 108 | |
| 109 | static void sme_remove_event(sme_event_t *, struct sysmon_envsys *); |
| 110 | |
| 111 | /* |
| 112 | * sme_event_register: |
| 113 | * |
| 114 | * + Registers a new sysmon envsys event or updates any event |
| 115 | * already in the queue. |
| 116 | */ |
| 117 | int |
| 118 | sme_event_register(prop_dictionary_t sdict, envsys_data_t *edata, |
| 119 | struct sysmon_envsys *sme, sysmon_envsys_lim_t *lims, |
| 120 | uint32_t props, int crittype, int powertype) |
| 121 | { |
| 122 | sme_event_t *see = NULL, *osee = NULL; |
| 123 | prop_object_t obj; |
| 124 | int error = 0; |
| 125 | const char *objkey; |
| 126 | const struct op_t *op; |
| 127 | |
| 128 | KASSERT(sdict != NULL); |
| 129 | KASSERT(edata != NULL); |
| 130 | KASSERT(sme != NULL); |
| 131 | KASSERT(lims != NULL); |
| 132 | |
| 133 | /* |
| 134 | * Some validation first for limit-checking events |
| 135 | * |
| 136 | * 1. Limits are not permitted if the units is ENVSYS_INDICATOR |
| 137 | * or ENVSYS_BATTERY_CHARGE. |
| 138 | * |
| 139 | * 2. Capacity limits are permitted only if the sensor has the |
| 140 | * ENVSYS_FPERCENT flag set and value_max is set. |
| 141 | * |
| 142 | * 3. It is not permissible for both capacity and value limits |
| 143 | * to coexist. |
| 144 | * |
| 145 | * Note that it permissible for a sensor to have value limits |
| 146 | * even if its ENVSYS_FPERCENT flag and value_max are set. |
| 147 | */ |
| 148 | |
| 149 | DPRINTF(("%s: units %d props 0x%04x upropset 0x%04x max_val %d" |
| 150 | " edata-flags 0x%04x\n" , __func__, edata->units, props, |
| 151 | edata->upropset, edata->value_max, edata->flags)); |
| 152 | |
| 153 | if (props) |
| 154 | if (edata->units == ENVSYS_INDICATOR || |
| 155 | edata->units == ENVSYS_BATTERY_CHARGE) |
| 156 | return ENOTSUP; |
| 157 | |
| 158 | if ((props & PROP_CAP_LIMITS) && |
| 159 | ((edata->value_max == 0) || |
| 160 | !(edata->flags & ENVSYS_FPERCENT) || |
| 161 | (props & PROP_VAL_LIMITS) || |
| 162 | (edata->upropset & PROP_VAL_LIMITS))) |
| 163 | props = 0; |
| 164 | |
| 165 | if ((props & PROP_VAL_LIMITS) && (edata->upropset & PROP_CAP_LIMITS)) |
| 166 | props = 0; |
| 167 | |
| 168 | /* |
| 169 | * check if the event is already on the list and return |
| 170 | * EEXIST if value provided hasn't been changed. |
| 171 | */ |
| 172 | mutex_enter(&sme->sme_mtx); |
| 173 | LIST_FOREACH(osee, &sme->sme_events_list, see_list) { |
| 174 | if (strcmp(edata->desc, osee->see_pes.pes_sensname) != 0) |
| 175 | continue; |
| 176 | if (crittype != osee->see_type && |
| 177 | osee->see_type != PENVSYS_EVENT_NULL) |
| 178 | continue; |
| 179 | |
| 180 | /* |
| 181 | * We found an existing event for this sensor. Make |
| 182 | * sure it references the correct edata |
| 183 | */ |
| 184 | KASSERT(edata == osee->see_edata); |
| 185 | |
| 186 | DPRINTF(("%s: dev %s sensor %s: event type %d exists\n" , |
| 187 | __func__, sme->sme_name, edata->desc, crittype)); |
| 188 | |
| 189 | see = osee; |
| 190 | if (props & edata->upropset & (PROP_CRITMAX | PROP_BATTMAX)) { |
| 191 | if (lims->sel_critmax == edata->limits.sel_critmax) { |
| 192 | DPRINTF(("%s: critmax exists\n" , __func__)); |
| 193 | error = EEXIST; |
| 194 | props &= ~(PROP_CRITMAX | PROP_BATTMAX); |
| 195 | } |
| 196 | } |
| 197 | if (props & edata->upropset & (PROP_WARNMAX | PROP_BATTHIGH)) { |
| 198 | if (lims->sel_warnmax == edata->limits.sel_warnmax) { |
| 199 | DPRINTF(("%s: warnmax exists\n" , __func__)); |
| 200 | error = EEXIST; |
| 201 | props &= ~(PROP_WARNMAX | PROP_BATTHIGH); |
| 202 | } |
| 203 | } |
| 204 | if (props & edata->upropset & (PROP_WARNMIN | PROP_BATTWARN)) { |
| 205 | if (lims->sel_warnmin == edata->limits.sel_warnmin) { |
| 206 | DPRINTF(("%s: warnmin exists\n" , __func__)); |
| 207 | error = EEXIST; |
| 208 | props &= ~(PROP_WARNMIN | PROP_BATTWARN); |
| 209 | } |
| 210 | } |
| 211 | if (props & edata->upropset & (PROP_CRITMIN | PROP_BATTCAP)) { |
| 212 | if (lims->sel_critmin == edata->limits.sel_critmin) { |
| 213 | DPRINTF(("%s: critmin exists\n" , __func__)); |
| 214 | error = EEXIST; |
| 215 | props &= ~(PROP_CRITMIN | PROP_BATTCAP); |
| 216 | } |
| 217 | } |
| 218 | if (props && see->see_type == PENVSYS_EVENT_NULL) |
| 219 | see->see_type = crittype; |
| 220 | |
| 221 | break; |
| 222 | } |
| 223 | if (crittype == PENVSYS_EVENT_NULL && see != NULL) { |
| 224 | mutex_exit(&sme->sme_mtx); |
| 225 | return EEXIST; |
| 226 | } |
| 227 | |
| 228 | if (see == NULL) { |
| 229 | /* |
| 230 | * New event requested - allocate a sysmon_envsys event. |
| 231 | */ |
| 232 | see = kmem_zalloc(sizeof(*see), KM_SLEEP); |
| 233 | if (see == NULL) |
| 234 | return ENOMEM; |
| 235 | |
| 236 | DPRINTF(("%s: dev %s sensor %s: new event\n" , |
| 237 | __func__, sme->sme_name, edata->desc)); |
| 238 | |
| 239 | see->see_type = crittype; |
| 240 | see->see_sme = sme; |
| 241 | see->see_edata = edata; |
| 242 | |
| 243 | /* Initialize sensor type and previously-sent state */ |
| 244 | |
| 245 | see->see_pes.pes_type = powertype; |
| 246 | |
| 247 | switch (crittype) { |
| 248 | case PENVSYS_EVENT_CAPACITY: |
| 249 | see->see_evstate = ENVSYS_BATTERY_CAPACITY_NORMAL; |
| 250 | break; |
| 251 | case PENVSYS_EVENT_STATE_CHANGED: |
| 252 | if (edata->units == ENVSYS_BATTERY_CAPACITY) |
| 253 | see->see_evstate = |
| 254 | ENVSYS_BATTERY_CAPACITY_NORMAL; |
| 255 | else if (edata->units == ENVSYS_DRIVE) |
| 256 | see->see_evstate = ENVSYS_DRIVE_EMPTY; |
| 257 | else if (edata->units == ENVSYS_INDICATOR) |
| 258 | see->see_evstate = ENVSYS_SVALID; |
| 259 | else |
| 260 | panic("%s: bad units for " |
| 261 | "PENVSYS_EVENT_STATE_CHANGED" , __func__); |
| 262 | break; |
| 263 | case PENVSYS_EVENT_CRITICAL: |
| 264 | case PENVSYS_EVENT_LIMITS: |
| 265 | default: |
| 266 | see->see_evstate = ENVSYS_SVALID; |
| 267 | break; |
| 268 | } |
| 269 | see->see_evvalue = 0; |
| 270 | |
| 271 | (void)strlcpy(see->see_pes.pes_dvname, sme->sme_name, |
| 272 | sizeof(see->see_pes.pes_dvname)); |
| 273 | (void)strlcpy(see->see_pes.pes_sensname, edata->desc, |
| 274 | sizeof(see->see_pes.pes_sensname)); |
| 275 | } |
| 276 | |
| 277 | /* |
| 278 | * Limit operation requested. |
| 279 | */ |
| 280 | for (op = limit_ops; op->name != NULL; op++) { |
| 281 | if (props & op->prop) { |
| 282 | objkey = op->name; |
| 283 | obj = prop_dictionary_get(sdict, objkey); |
| 284 | if (obj != NULL && |
| 285 | prop_object_type(obj) != PROP_TYPE_NUMBER) { |
| 286 | DPRINTF(("%s: (%s) %s object not TYPE_NUMBER\n" , |
| 287 | __func__, sme->sme_name, objkey)); |
| 288 | error = ENOTSUP; |
| 289 | } else { |
| 290 | edata->limits.sel_limit_list[op->idx] = |
| 291 | lims->sel_limit_list[op->idx]; |
| 292 | error = sme_sensor_upint32(sdict, objkey, |
| 293 | lims->sel_limit_list[op->idx]); |
| 294 | DPRINTF(("%s: (%s) event [sensor=%s type=%d] " |
| 295 | "(%s updated)\n" , __func__, sme->sme_name, |
| 296 | edata->desc, crittype, objkey)); |
| 297 | } |
| 298 | if (error && error != EEXIST) |
| 299 | goto out; |
| 300 | edata->upropset |= op->prop; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | if (props & PROP_DRIVER_LIMITS) |
| 305 | edata->upropset |= PROP_DRIVER_LIMITS; |
| 306 | else |
| 307 | edata->upropset &= ~PROP_DRIVER_LIMITS; |
| 308 | |
| 309 | DPRINTF(("%s: (%s) event registered (sensor=%s snum=%d type=%d " |
| 310 | "critmin=%" PRIu32 " warnmin=%" PRIu32 " warnmax=%" PRIu32 |
| 311 | " critmax=%" PRIu32 " props 0x%04x)\n" , __func__, |
| 312 | see->see_sme->sme_name, see->see_pes.pes_sensname, |
| 313 | edata->sensor, see->see_type, edata->limits.sel_critmin, |
| 314 | edata->limits.sel_warnmin, edata->limits.sel_warnmax, |
| 315 | edata->limits.sel_critmax, edata->upropset)); |
| 316 | /* |
| 317 | * Initialize the events framework if it wasn't initialized before. |
| 318 | */ |
| 319 | if ((sme->sme_flags & SME_CALLOUT_INITIALIZED) == 0) |
| 320 | error = sme_events_init(sme); |
| 321 | |
| 322 | /* |
| 323 | * If driver requested notification, advise it of new |
| 324 | * limit values |
| 325 | */ |
| 326 | if (sme->sme_set_limits) |
| 327 | (*sme->sme_set_limits)(sme, edata, &(edata->limits), |
| 328 | &(edata->upropset)); |
| 329 | |
| 330 | out: |
| 331 | if ((error == 0 || error == EEXIST) && osee == NULL) |
| 332 | LIST_INSERT_HEAD(&sme->sme_events_list, see, see_list); |
| 333 | |
| 334 | mutex_exit(&sme->sme_mtx); |
| 335 | |
| 336 | return error; |
| 337 | } |
| 338 | |
| 339 | /* |
| 340 | * sme_event_unregister_all: |
| 341 | * |
| 342 | * + Unregisters all events associated with a sysmon envsys device. |
| 343 | */ |
| 344 | void |
| 345 | sme_event_unregister_all(struct sysmon_envsys *sme) |
| 346 | { |
| 347 | sme_event_t *see; |
| 348 | int evcounter = 0; |
| 349 | bool destroy = false; |
| 350 | |
| 351 | KASSERT(sme != NULL); |
| 352 | |
| 353 | mutex_enter(&sme->sme_mtx); |
| 354 | LIST_FOREACH(see, &sme->sme_events_list, see_list) { |
| 355 | while (see->see_flags & SEE_EVENT_WORKING) |
| 356 | cv_wait(&sme->sme_condvar, &sme->sme_mtx); |
| 357 | |
| 358 | if (strcmp(see->see_pes.pes_dvname, sme->sme_name) == 0) |
| 359 | evcounter++; |
| 360 | } |
| 361 | |
| 362 | DPRINTF(("%s: total events %d (%s)\n" , __func__, |
| 363 | evcounter, sme->sme_name)); |
| 364 | |
| 365 | while ((see = LIST_FIRST(&sme->sme_events_list))) { |
| 366 | if (evcounter == 0) |
| 367 | break; |
| 368 | |
| 369 | if (strcmp(see->see_pes.pes_dvname, sme->sme_name) == 0) { |
| 370 | DPRINTF(("%s: event %s %d removed (%s)\n" , __func__, |
| 371 | see->see_pes.pes_sensname, see->see_type, |
| 372 | sme->sme_name)); |
| 373 | sme_remove_event(see, sme); |
| 374 | |
| 375 | evcounter--; |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | if (LIST_EMPTY(&sme->sme_events_list) && |
| 380 | sme->sme_flags & SME_CALLOUT_INITIALIZED) { |
| 381 | sme_events_halt_callout(sme); |
| 382 | destroy = true; |
| 383 | } |
| 384 | mutex_exit(&sme->sme_mtx); |
| 385 | |
| 386 | if (destroy) |
| 387 | sme_events_destroy(sme); |
| 388 | } |
| 389 | |
| 390 | /* |
| 391 | * sme_event_unregister: |
| 392 | * |
| 393 | * + Unregisters an event from the specified sysmon envsys device. |
| 394 | */ |
| 395 | int |
| 396 | sme_event_unregister(struct sysmon_envsys *sme, const char *sensor, int type) |
| 397 | { |
| 398 | sme_event_t *see; |
| 399 | bool found = false; |
| 400 | bool destroy = false; |
| 401 | |
| 402 | KASSERT(sensor != NULL); |
| 403 | |
| 404 | mutex_enter(&sme->sme_mtx); |
| 405 | LIST_FOREACH(see, &sme->sme_events_list, see_list) { |
| 406 | if (strcmp(see->see_pes.pes_sensname, sensor) == 0) { |
| 407 | if (see->see_type == type) { |
| 408 | found = true; |
| 409 | break; |
| 410 | } |
| 411 | } |
| 412 | } |
| 413 | |
| 414 | if (!found) { |
| 415 | mutex_exit(&sme->sme_mtx); |
| 416 | return EINVAL; |
| 417 | } |
| 418 | |
| 419 | /* |
| 420 | * Wait for the event to finish its work, remove it from the list |
| 421 | * and release resources. |
| 422 | */ |
| 423 | while (see->see_flags & SEE_EVENT_WORKING) |
| 424 | cv_wait(&sme->sme_condvar, &sme->sme_mtx); |
| 425 | |
| 426 | DPRINTF(("%s: removed dev=%s sensor=%s type=%d\n" , |
| 427 | __func__, see->see_pes.pes_dvname, sensor, type)); |
| 428 | |
| 429 | sme_remove_event(see, sme); |
| 430 | |
| 431 | if (LIST_EMPTY(&sme->sme_events_list)) { |
| 432 | sme_events_halt_callout(sme); |
| 433 | destroy = true; |
| 434 | } |
| 435 | mutex_exit(&sme->sme_mtx); |
| 436 | |
| 437 | if (destroy) |
| 438 | sme_events_destroy(sme); |
| 439 | |
| 440 | return 0; |
| 441 | } |
| 442 | |
| 443 | /* |
| 444 | * sme_event_unregister_sensor: |
| 445 | * |
| 446 | * + Unregisters any event associated with a specific sensor |
| 447 | * The caller must already own the sme_mtx. |
| 448 | */ |
| 449 | int |
| 450 | sme_event_unregister_sensor(struct sysmon_envsys *sme, envsys_data_t *edata) |
| 451 | { |
| 452 | sme_event_t *see; |
| 453 | bool found = false; |
| 454 | |
| 455 | KASSERT(mutex_owned(&sme->sme_mtx)); |
| 456 | LIST_FOREACH(see, &sme->sme_events_list, see_list) { |
| 457 | if (see->see_edata == edata) { |
| 458 | found = true; |
| 459 | break; |
| 460 | } |
| 461 | } |
| 462 | if (!found) |
| 463 | return EINVAL; |
| 464 | |
| 465 | /* |
| 466 | * Wait for the event to finish its work, remove it from the list |
| 467 | * and release resources. |
| 468 | */ |
| 469 | while (see->see_flags & SEE_EVENT_WORKING) |
| 470 | cv_wait(&sme->sme_condvar, &sme->sme_mtx); |
| 471 | |
| 472 | DPRINTF(("%s: removed dev=%s sensor=%s\n" , |
| 473 | __func__, see->see_pes.pes_dvname, edata->desc)); |
| 474 | |
| 475 | sme_remove_event(see, sme); |
| 476 | |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | static void |
| 481 | sme_remove_event(sme_event_t *see, struct sysmon_envsys *sme) |
| 482 | { |
| 483 | |
| 484 | KASSERT(mutex_owned(&sme->sme_mtx)); |
| 485 | |
| 486 | if (see->see_edata->flags & ENVSYS_FHAS_ENTROPY) |
| 487 | rnd_detach_source(&see->see_edata->rnd_src); |
| 488 | LIST_REMOVE(see, see_list); |
| 489 | kmem_free(see, sizeof(*see)); |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | * sme_event_drvadd: |
| 494 | * |
| 495 | * + Registers a new event for a device that had enabled any of |
| 496 | * the monitoring flags in the driver. |
| 497 | */ |
| 498 | void |
| 499 | sme_event_drvadd(void *arg) |
| 500 | { |
| 501 | sme_event_drv_t *sed_t = arg; |
| 502 | sysmon_envsys_lim_t lims; |
| 503 | uint32_t props; |
| 504 | int error = 0; |
| 505 | const struct ev_reg_t *reg; |
| 506 | |
| 507 | KASSERT(sed_t != NULL); |
| 508 | |
| 509 | /* |
| 510 | * If driver provides a method to retrieve its internal limit |
| 511 | * values, call it and use those returned values as initial |
| 512 | * limits for event monitoring. |
| 513 | */ |
| 514 | props = 0; |
| 515 | if (sed_t->sed_edata->flags & ENVSYS_FMONLIMITS) |
| 516 | if (sed_t->sed_sme->sme_get_limits) |
| 517 | (*sed_t->sed_sme->sme_get_limits)(sed_t->sed_sme, |
| 518 | sed_t->sed_edata, |
| 519 | &lims, &props); |
| 520 | /* |
| 521 | * If driver doesn't provide a way to "absorb" user-specified |
| 522 | * limit values, we must monitor all limits ourselves |
| 523 | */ |
| 524 | if (sed_t->sed_sme->sme_set_limits == NULL) |
| 525 | props &= ~PROP_DRIVER_LIMITS; |
| 526 | |
| 527 | /* Register the events that were specified */ |
| 528 | |
| 529 | for (reg = reg_events; reg->name != NULL; reg++) { |
| 530 | if (sed_t->sed_edata->flags & reg->crittype) { |
| 531 | |
| 532 | error = sme_event_register(sed_t->sed_sdict, |
| 533 | sed_t->sed_edata, |
| 534 | sed_t->sed_sme, |
| 535 | &lims, props, |
| 536 | reg->powertype, |
| 537 | sed_t->sed_powertype); |
| 538 | if (error && error != EEXIST) |
| 539 | printf("%s: failed to add event! " |
| 540 | "error=%d sensor=%s event=%s\n" , |
| 541 | __func__, error, |
| 542 | sed_t->sed_edata->desc, reg->name); |
| 543 | else { |
| 544 | char str[ENVSYS_DESCLEN] = "monitoring-state-" ; |
| 545 | (void)strlcat(str, reg->name, sizeof(str)); |
| 546 | prop_dictionary_set_bool(sed_t->sed_sdict, |
| 547 | str, true); |
| 548 | } |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | /* |
| 553 | * we are done, free memory now. |
| 554 | */ |
| 555 | kmem_free(sed_t, sizeof(*sed_t)); |
| 556 | } |
| 557 | |
| 558 | /* |
| 559 | * sme_events_init: |
| 560 | * |
| 561 | * + Initialize the events framework for this device. |
| 562 | */ |
| 563 | int |
| 564 | sme_events_init(struct sysmon_envsys *sme) |
| 565 | { |
| 566 | int error = 0; |
| 567 | |
| 568 | KASSERT(sme != NULL); |
| 569 | KASSERT(mutex_owned(&sme->sme_mtx)); |
| 570 | |
| 571 | error = workqueue_create(&sme->sme_wq, sme->sme_name, |
| 572 | sme_events_worker, sme, PRI_NONE, IPL_SOFTCLOCK, WQ_MPSAFE); |
| 573 | if (error) |
| 574 | return error; |
| 575 | |
| 576 | callout_init(&sme->sme_callout, CALLOUT_MPSAFE); |
| 577 | callout_setfunc(&sme->sme_callout, sme_events_check, sme); |
| 578 | sme->sme_flags |= SME_CALLOUT_INITIALIZED; |
| 579 | sme_schedule_callout(sme); |
| 580 | DPRINTF(("%s: events framework initialized for '%s'\n" , |
| 581 | __func__, sme->sme_name)); |
| 582 | |
| 583 | return error; |
| 584 | } |
| 585 | |
| 586 | /* |
| 587 | * sme_schedule_callout |
| 588 | * |
| 589 | * (Re)-schedule the device's callout timer |
| 590 | */ |
| 591 | void |
| 592 | sme_schedule_callout(struct sysmon_envsys *sme) |
| 593 | { |
| 594 | uint64_t timo; |
| 595 | |
| 596 | KASSERT(sme != NULL); |
| 597 | |
| 598 | if ((sme->sme_flags & SME_CALLOUT_INITIALIZED) == 0) |
| 599 | return; |
| 600 | |
| 601 | if (sme->sme_events_timeout) |
| 602 | timo = sme->sme_events_timeout * hz; |
| 603 | else |
| 604 | timo = SME_EVTIMO; |
| 605 | |
| 606 | callout_stop(&sme->sme_callout); |
| 607 | callout_schedule(&sme->sme_callout, timo); |
| 608 | } |
| 609 | |
| 610 | /* |
| 611 | * sme_events_halt_callout: |
| 612 | * |
| 613 | * + Halt the callout of the event framework for this device. |
| 614 | */ |
| 615 | void |
| 616 | sme_events_halt_callout(struct sysmon_envsys *sme) |
| 617 | { |
| 618 | KASSERT(mutex_owned(&sme->sme_mtx)); |
| 619 | |
| 620 | /* |
| 621 | * Unset before callout_halt to ensure callout is not scheduled again |
| 622 | * during callout_halt. |
| 623 | */ |
| 624 | sme->sme_flags &= ~SME_CALLOUT_INITIALIZED; |
| 625 | |
| 626 | callout_halt(&sme->sme_callout, &sme->sme_mtx); |
| 627 | } |
| 628 | |
| 629 | /* |
| 630 | * sme_events_destroy: |
| 631 | * |
| 632 | * + Destroy the callout and the workqueue of the event framework |
| 633 | * for this device. |
| 634 | */ |
| 635 | void |
| 636 | sme_events_destroy(struct sysmon_envsys *sme) |
| 637 | { |
| 638 | KASSERT(!mutex_owned(&sme->sme_mtx)); |
| 639 | KASSERT((sme->sme_flags & SME_CALLOUT_INITIALIZED) == 0); |
| 640 | |
| 641 | callout_destroy(&sme->sme_callout); |
| 642 | workqueue_destroy(sme->sme_wq); |
| 643 | |
| 644 | DPRINTF(("%s: events framework destroyed for '%s'\n" , |
| 645 | __func__, sme->sme_name)); |
| 646 | } |
| 647 | |
| 648 | /* |
| 649 | * sysmon_envsys_update_limits |
| 650 | * |
| 651 | * + If a driver needs to update the limits that it is providing, |
| 652 | * we need to update the dictionary data as well as the limits. |
| 653 | * This only makes sense if the driver is capable of providing |
| 654 | * its limits, and if there is a limits event-monitor. |
| 655 | */ |
| 656 | int |
| 657 | sysmon_envsys_update_limits(struct sysmon_envsys *sme, envsys_data_t *edata) |
| 658 | { |
| 659 | int err; |
| 660 | |
| 661 | sysmon_envsys_acquire(sme, false); |
| 662 | if (sme->sme_get_limits == NULL || |
| 663 | (edata->flags & ENVSYS_FMONLIMITS) == 0) |
| 664 | err = EINVAL; |
| 665 | else |
| 666 | err = sme_update_limits(sme, edata); |
| 667 | sysmon_envsys_release(sme, false); |
| 668 | |
| 669 | return err; |
| 670 | } |
| 671 | |
| 672 | /* |
| 673 | * sme_update_limits |
| 674 | * |
| 675 | * + Internal version of sysmon_envsys_update_limits() to be used |
| 676 | * when the device has already been sysmon_envsys_acquire()d. |
| 677 | */ |
| 678 | |
| 679 | int |
| 680 | sme_update_limits(struct sysmon_envsys *sme, envsys_data_t *edata) |
| 681 | { |
| 682 | prop_dictionary_t sdict = NULL; |
| 683 | prop_array_t array = NULL; |
| 684 | sysmon_envsys_lim_t lims; |
| 685 | sme_event_t *see; |
| 686 | uint32_t props = 0; |
| 687 | |
| 688 | /* Find the dictionary for this sensor */ |
| 689 | array = prop_dictionary_get(sme_propd, sme->sme_name); |
| 690 | if (array == NULL || |
| 691 | prop_object_type(array) != PROP_TYPE_ARRAY) { |
| 692 | DPRINTF(("%s: array device failed\n" , __func__)); |
| 693 | return EINVAL; |
| 694 | } |
| 695 | |
| 696 | sdict = prop_array_get(array, edata->sensor); |
| 697 | if (sdict == NULL) { |
| 698 | return EINVAL; |
| 699 | } |
| 700 | |
| 701 | /* Find the event definition to get its powertype */ |
| 702 | LIST_FOREACH(see, &sme->sme_events_list, see_list) { |
| 703 | if (edata == see->see_edata && |
| 704 | see->see_type == PENVSYS_EVENT_LIMITS) |
| 705 | break; |
| 706 | } |
| 707 | if (see == NULL) |
| 708 | return EINVAL; |
| 709 | |
| 710 | /* Update limit values from driver if possible */ |
| 711 | if (sme->sme_get_limits != NULL) |
| 712 | (*sme->sme_get_limits)(sme, edata, &lims, &props); |
| 713 | |
| 714 | /* Update event and dictionary */ |
| 715 | sme_event_register(sdict, edata, sme, &lims, props, |
| 716 | PENVSYS_EVENT_LIMITS, see->see_pes.pes_type); |
| 717 | |
| 718 | return 0; |
| 719 | } |
| 720 | |
| 721 | /* |
| 722 | * sme_events_check: |
| 723 | * |
| 724 | * + Passes the events to the workqueue thread and stops |
| 725 | * the callout if the 'low-power' condition is triggered. |
| 726 | */ |
| 727 | void |
| 728 | sme_events_check(void *arg) |
| 729 | { |
| 730 | struct sysmon_envsys *sme = arg; |
| 731 | sme_event_t *see; |
| 732 | |
| 733 | KASSERT(sme != NULL); |
| 734 | |
| 735 | mutex_enter(&sme->sme_work_mtx); |
| 736 | if (sme->sme_busy > 0) { |
| 737 | log(LOG_WARNING, "%s: workqueue busy: updates stopped\n" , |
| 738 | sme->sme_name); |
| 739 | mutex_exit(&sme->sme_work_mtx); |
| 740 | return; |
| 741 | } |
| 742 | if (!mutex_tryenter(&sme->sme_mtx)) { |
| 743 | /* can't get lock - try again later */ |
| 744 | if (!sysmon_low_power) |
| 745 | sme_schedule_callout(sme); |
| 746 | mutex_exit(&sme->sme_work_mtx); |
| 747 | return; |
| 748 | } |
| 749 | LIST_FOREACH(see, &sme->sme_events_list, see_list) { |
| 750 | workqueue_enqueue(sme->sme_wq, &see->see_wk, NULL); |
| 751 | see->see_edata->flags |= ENVSYS_FNEED_REFRESH; |
| 752 | sme->sme_busy++; |
| 753 | } |
| 754 | if (!sysmon_low_power) |
| 755 | sme_schedule_callout(sme); |
| 756 | mutex_exit(&sme->sme_work_mtx); |
| 757 | mutex_exit(&sme->sme_mtx); |
| 758 | } |
| 759 | |
| 760 | /* |
| 761 | * sme_events_worker: |
| 762 | * |
| 763 | * + workqueue thread that checks if there's a critical condition |
| 764 | * and sends an event if it was triggered. |
| 765 | */ |
| 766 | void |
| 767 | sme_events_worker(struct work *wk, void *arg) |
| 768 | { |
| 769 | sme_event_t *see = (void *)wk; |
| 770 | struct sysmon_envsys *sme = see->see_sme; |
| 771 | envsys_data_t *edata = see->see_edata; |
| 772 | |
| 773 | KASSERT(wk == &see->see_wk); |
| 774 | KASSERT(sme != NULL); |
| 775 | KASSERT(edata != NULL); |
| 776 | |
| 777 | mutex_enter(&sme->sme_mtx); |
| 778 | see->see_flags |= SEE_EVENT_WORKING; |
| 779 | /* |
| 780 | * sme_events_check marks the sensors to make us refresh them here. |
| 781 | * sme_envsys_refresh_sensor will not call the driver if the driver |
| 782 | * does its own setting of the sensor value. |
| 783 | */ |
| 784 | if ((edata->flags & ENVSYS_FNEED_REFRESH) != 0) { |
| 785 | /* refresh sensor in device */ |
| 786 | sysmon_envsys_refresh_sensor(sme, edata); |
| 787 | edata->flags &= ~ENVSYS_FNEED_REFRESH; |
| 788 | } |
| 789 | |
| 790 | DPRINTFOBJ(("%s: (%s) desc=%s sensor=%d type=%d state=%d units=%d " |
| 791 | "value_cur=%d upropset=0x%04x\n" , __func__, sme->sme_name, edata->desc, |
| 792 | edata->sensor, see->see_type, edata->state, edata->units, |
| 793 | edata->value_cur, edata->upropset)); |
| 794 | |
| 795 | /* skip the event if current sensor is in invalid state */ |
| 796 | if (edata->state == ENVSYS_SINVALID) |
| 797 | goto out; |
| 798 | |
| 799 | /* |
| 800 | * For range limits, if the driver claims responsibility for |
| 801 | * limit/range checking, just user driver-supplied status. |
| 802 | * Else calculate our own status. Note that driver must |
| 803 | * relinquish responsibility for ALL limits if there is even |
| 804 | * one limit that it cannot handle! |
| 805 | * |
| 806 | * If this is a CAPACITY monitor, but the sensor's max_value |
| 807 | * is not set, treat it as though the monitor does not exist. |
| 808 | */ |
| 809 | if ((see->see_type == PENVSYS_EVENT_LIMITS || |
| 810 | see->see_type == PENVSYS_EVENT_CAPACITY) && |
| 811 | (edata->upropset & PROP_DRIVER_LIMITS) == 0) { |
| 812 | if ((see->see_type == PENVSYS_EVENT_CAPACITY) && |
| 813 | (edata->value_max == 0)) |
| 814 | edata->state = ENVSYS_SVALID; |
| 815 | else if ((edata->upropset & (PROP_CRITMIN | PROP_BATTCAP)) && |
| 816 | (edata->value_cur < edata->limits.sel_critmin)) |
| 817 | edata->state = ENVSYS_SCRITUNDER; |
| 818 | else if ((edata->upropset & (PROP_WARNMIN | PROP_BATTWARN)) && |
| 819 | (edata->value_cur < edata->limits.sel_warnmin)) |
| 820 | edata->state = ENVSYS_SWARNUNDER; |
| 821 | else if ((edata->upropset & (PROP_CRITMAX | PROP_BATTMAX)) && |
| 822 | (edata->value_cur > edata->limits.sel_critmax)) |
| 823 | edata->state = ENVSYS_SCRITOVER; |
| 824 | else if ((edata->upropset & (PROP_WARNMAX | PROP_BATTHIGH)) && |
| 825 | (edata->value_cur > edata->limits.sel_warnmax)) |
| 826 | edata->state = ENVSYS_SWARNOVER; |
| 827 | else |
| 828 | edata->state = ENVSYS_SVALID; |
| 829 | } |
| 830 | sme_deliver_event(see); |
| 831 | |
| 832 | out: |
| 833 | see->see_flags &= ~SEE_EVENT_WORKING; |
| 834 | cv_broadcast(&sme->sme_condvar); |
| 835 | mutex_enter(&sme->sme_work_mtx); |
| 836 | KASSERT(sme->sme_busy > 0); |
| 837 | sme->sme_busy--; |
| 838 | mutex_exit(&sme->sme_work_mtx); |
| 839 | mutex_exit(&sme->sme_mtx); |
| 840 | } |
| 841 | |
| 842 | /* |
| 843 | * sysmon_envsys_sensor_event |
| 844 | * |
| 845 | * + Find the monitor event of a particular type for a given sensor |
| 846 | * on a device and deliver the event if one is required. If |
| 847 | * no event type is specified, deliver all events for the sensor. |
| 848 | */ |
| 849 | void |
| 850 | sysmon_envsys_sensor_event(struct sysmon_envsys *sme, envsys_data_t *edata, |
| 851 | int ev_type) |
| 852 | { |
| 853 | sme_event_t *see; |
| 854 | |
| 855 | mutex_enter(&sme->sme_mtx); |
| 856 | LIST_FOREACH(see, &sme->sme_events_list, see_list) { |
| 857 | if (edata != see->see_edata) |
| 858 | continue; |
| 859 | if (ev_type == 0 || |
| 860 | ev_type == see->see_type) { |
| 861 | sme_deliver_event(see); |
| 862 | if (ev_type != 0) |
| 863 | break; |
| 864 | } |
| 865 | } |
| 866 | mutex_exit(&sme->sme_mtx); |
| 867 | } |
| 868 | |
| 869 | /* |
| 870 | * sme_deliver_event: |
| 871 | * |
| 872 | * + If new sensor state requires it, send an event to powerd |
| 873 | * |
| 874 | * Must be called with the device's sysmon mutex held |
| 875 | * see->see_sme->sme_mtx |
| 876 | */ |
| 877 | void |
| 878 | sme_deliver_event(sme_event_t *see) |
| 879 | { |
| 880 | envsys_data_t *edata = see->see_edata; |
| 881 | const struct sme_descr_entry *sdt = NULL; |
| 882 | const struct sme_sensor_event *sse = sme_sensor_event; |
| 883 | int i, state = 0; |
| 884 | |
| 885 | switch (see->see_type) { |
| 886 | case PENVSYS_EVENT_LIMITS: |
| 887 | case PENVSYS_EVENT_CAPACITY: |
| 888 | /* |
| 889 | * Send event if state has changed |
| 890 | */ |
| 891 | if (edata->state == see->see_evstate) |
| 892 | break; |
| 893 | |
| 894 | for (i = 0; sse[i].state != -1; i++) |
| 895 | if (sse[i].state == edata->state) |
| 896 | break; |
| 897 | |
| 898 | if (sse[i].state == -1) |
| 899 | break; |
| 900 | |
| 901 | if (edata->state == ENVSYS_SVALID) |
| 902 | sysmon_penvsys_event(&see->see_pes, |
| 903 | PENVSYS_EVENT_NORMAL); |
| 904 | else |
| 905 | sysmon_penvsys_event(&see->see_pes, sse[i].event); |
| 906 | |
| 907 | see->see_evstate = edata->state; |
| 908 | DPRINTFOBJ(("%s: (%s) desc=%s sensor=%d state=%d send_ev=%d\n" , |
| 909 | __func__, see->see_sme->sme_name, edata->desc, |
| 910 | edata->sensor, edata->state, |
| 911 | (edata->state == ENVSYS_SVALID) ? PENVSYS_EVENT_NORMAL : |
| 912 | sse[i].event)); |
| 913 | |
| 914 | break; |
| 915 | |
| 916 | /* |
| 917 | * Send PENVSYS_EVENT_CRITICAL event if: |
| 918 | * State has gone from non-CRITICAL to CRITICAL, |
| 919 | * State remains CRITICAL and value has changed, or |
| 920 | * State has returned from CRITICAL to non-CRITICAL |
| 921 | */ |
| 922 | case PENVSYS_EVENT_CRITICAL: |
| 923 | DPRINTF(("%s: CRITICAL: old/new state %d/%d, old/new value " |
| 924 | "%d/%d\n" , __func__, see->see_evstate, edata->state, |
| 925 | see->see_evvalue, edata->value_cur)); |
| 926 | if (edata->state == ENVSYS_SVALID && |
| 927 | see->see_evstate != ENVSYS_SVALID) { |
| 928 | sysmon_penvsys_event(&see->see_pes, |
| 929 | PENVSYS_EVENT_NORMAL); |
| 930 | see->see_evstate = ENVSYS_SVALID; |
| 931 | break; |
| 932 | } else if (edata->state != ENVSYS_SCRITICAL) |
| 933 | break; |
| 934 | if (see->see_evstate != ENVSYS_SCRITICAL || |
| 935 | see->see_evvalue != edata->value_cur) { |
| 936 | sysmon_penvsys_event(&see->see_pes, |
| 937 | PENVSYS_EVENT_CRITICAL); |
| 938 | see->see_evstate = ENVSYS_SCRITICAL; |
| 939 | } |
| 940 | see->see_evvalue = edata->value_cur; |
| 941 | break; |
| 942 | |
| 943 | /* |
| 944 | * if value_cur is not normal (battery) or online (drive), |
| 945 | * send the event... |
| 946 | */ |
| 947 | case PENVSYS_EVENT_STATE_CHANGED: |
| 948 | /* |
| 949 | * the state has not been changed, just ignore the event. |
| 950 | */ |
| 951 | if (edata->value_cur == see->see_evvalue) |
| 952 | break; |
| 953 | |
| 954 | switch (edata->units) { |
| 955 | case ENVSYS_DRIVE: |
| 956 | sdt = sme_find_table_entry(SME_DESC_DRIVE_STATES, |
| 957 | edata->value_cur); |
| 958 | state = ENVSYS_DRIVE_ONLINE; |
| 959 | break; |
| 960 | case ENVSYS_BATTERY_CAPACITY: |
| 961 | sdt = sme_find_table_entry(SME_DESC_BATTERY_CAPACITY, |
| 962 | edata->value_cur); |
| 963 | state = ENVSYS_BATTERY_CAPACITY_NORMAL; |
| 964 | break; |
| 965 | case ENVSYS_INDICATOR: |
| 966 | sdt = sme_find_table_entry(SME_DESC_INDICATOR, |
| 967 | edata->value_cur); |
| 968 | state = see->see_evvalue; /* force state change */ |
| 969 | break; |
| 970 | default: |
| 971 | panic("%s: bad units for PENVSYS_EVENT_STATE_CHANGED" , |
| 972 | __func__); |
| 973 | } |
| 974 | |
| 975 | if (sdt->type == -1) |
| 976 | break; |
| 977 | |
| 978 | /* |
| 979 | * copy current state description. |
| 980 | */ |
| 981 | (void)strlcpy(see->see_pes.pes_statedesc, sdt->desc, |
| 982 | sizeof(see->see_pes.pes_statedesc)); |
| 983 | |
| 984 | if (edata->value_cur == state) |
| 985 | /* |
| 986 | * state returned to normal condition |
| 987 | */ |
| 988 | sysmon_penvsys_event(&see->see_pes, |
| 989 | PENVSYS_EVENT_NORMAL); |
| 990 | else |
| 991 | /* |
| 992 | * state changed to abnormal condition |
| 993 | */ |
| 994 | sysmon_penvsys_event(&see->see_pes, see->see_type); |
| 995 | |
| 996 | see->see_evvalue = edata->value_cur; |
| 997 | |
| 998 | /* |
| 999 | * There's no need to continue if it's a drive sensor. |
| 1000 | */ |
| 1001 | if (edata->units == ENVSYS_DRIVE) |
| 1002 | break; |
| 1003 | |
| 1004 | /* |
| 1005 | * Check if the system is running in low power and send the |
| 1006 | * event to powerd (if running) or shutdown the system |
| 1007 | * otherwise. |
| 1008 | */ |
| 1009 | if (!sysmon_low_power && sme_event_check_low_power()) { |
| 1010 | struct penvsys_state pes; |
| 1011 | |
| 1012 | /* |
| 1013 | * Stop the callout and send the 'low-power' event. |
| 1014 | */ |
| 1015 | sysmon_low_power = true; |
| 1016 | callout_stop(&see->see_sme->sme_callout); |
| 1017 | pes.pes_type = PENVSYS_TYPE_BATTERY; |
| 1018 | sysmon_penvsys_event(&pes, PENVSYS_EVENT_LOW_POWER); |
| 1019 | } |
| 1020 | break; |
| 1021 | case PENVSYS_EVENT_NULL: |
| 1022 | break; |
| 1023 | default: |
| 1024 | panic("%s: invalid event type %d" , __func__, see->see_type); |
| 1025 | } |
| 1026 | } |
| 1027 | |
| 1028 | /* |
| 1029 | * Returns true if the system is in low power state: an AC adapter |
| 1030 | * is OFF and all batteries are in LOW/CRITICAL state. |
| 1031 | */ |
| 1032 | static bool |
| 1033 | sme_event_check_low_power(void) |
| 1034 | { |
| 1035 | if (!sme_acadapter_check()) |
| 1036 | return false; |
| 1037 | |
| 1038 | return sme_battery_check(); |
| 1039 | } |
| 1040 | |
| 1041 | /* |
| 1042 | * Called with the sysmon_envsys device mtx held through the |
| 1043 | * workqueue thread. |
| 1044 | */ |
| 1045 | static bool |
| 1046 | sme_acadapter_check(void) |
| 1047 | { |
| 1048 | struct sysmon_envsys *sme; |
| 1049 | envsys_data_t *edata; |
| 1050 | bool dev = false, sensor = false; |
| 1051 | |
| 1052 | LIST_FOREACH(sme, &sysmon_envsys_list, sme_list) { |
| 1053 | if (sme->sme_class == SME_CLASS_ACADAPTER) { |
| 1054 | dev = true; |
| 1055 | break; |
| 1056 | } |
| 1057 | } |
| 1058 | |
| 1059 | /* |
| 1060 | * No AC Adapter devices were found. |
| 1061 | */ |
| 1062 | if (!dev) |
| 1063 | return false; |
| 1064 | |
| 1065 | /* |
| 1066 | * Check if there's an AC adapter device connected. |
| 1067 | */ |
| 1068 | TAILQ_FOREACH(edata, &sme->sme_sensors_list, sensors_head) { |
| 1069 | if (edata->units == ENVSYS_INDICATOR) { |
| 1070 | sensor = true; |
| 1071 | /* refresh current sensor */ |
| 1072 | sysmon_envsys_refresh_sensor(sme, edata); |
| 1073 | |
| 1074 | if (edata->value_cur) |
| 1075 | return false; |
| 1076 | } |
| 1077 | } |
| 1078 | |
| 1079 | if (!sensor) |
| 1080 | return false; |
| 1081 | |
| 1082 | /* |
| 1083 | * AC adapter found and not connected. |
| 1084 | */ |
| 1085 | return true; |
| 1086 | } |
| 1087 | |
| 1088 | /* |
| 1089 | * Called with the sysmon_envsys device mtx held through the |
| 1090 | * workqueue thread. |
| 1091 | */ |
| 1092 | static bool |
| 1093 | sme_battery_check(void) |
| 1094 | { |
| 1095 | struct sysmon_envsys *sme; |
| 1096 | envsys_data_t *edata; |
| 1097 | int batteriesfound = 0; |
| 1098 | bool present, batterycap, batterycharge; |
| 1099 | |
| 1100 | /* |
| 1101 | * Check for battery devices and its state. |
| 1102 | */ |
| 1103 | LIST_FOREACH(sme, &sysmon_envsys_list, sme_list) { |
| 1104 | if (sme->sme_class != SME_CLASS_BATTERY) |
| 1105 | continue; |
| 1106 | |
| 1107 | present = true; |
| 1108 | |
| 1109 | /* |
| 1110 | * XXX |
| 1111 | * this assumes that the first valid ENVSYS_INDICATOR is the |
| 1112 | * presence indicator |
| 1113 | */ |
| 1114 | TAILQ_FOREACH(edata, &sme->sme_sensors_list, sensors_head) { |
| 1115 | if ((edata->units == ENVSYS_INDICATOR) && |
| 1116 | (edata->state == ENVSYS_SVALID)) { |
| 1117 | present = edata->value_cur; |
| 1118 | break; |
| 1119 | } |
| 1120 | } |
| 1121 | if (!present) |
| 1122 | continue; |
| 1123 | /* |
| 1124 | * We've found a battery device... |
| 1125 | */ |
| 1126 | batteriesfound++; |
| 1127 | batterycap = batterycharge = false; |
| 1128 | TAILQ_FOREACH(edata, &sme->sme_sensors_list, sensors_head) { |
| 1129 | /* no need to even look at sensors that aren't valid */ |
| 1130 | if (edata->state != ENVSYS_SVALID) |
| 1131 | continue; |
| 1132 | if (edata->units == ENVSYS_BATTERY_CAPACITY) { |
| 1133 | batterycap = true; |
| 1134 | if (!sme_battery_critical(edata)) |
| 1135 | return false; |
| 1136 | } else if (edata->units == ENVSYS_BATTERY_CHARGE) { |
| 1137 | batterycharge = true; |
| 1138 | if (edata->value_cur) |
| 1139 | return false; |
| 1140 | } |
| 1141 | } |
| 1142 | if (!batterycap || !batterycharge) |
| 1143 | return false; |
| 1144 | } |
| 1145 | |
| 1146 | if (!batteriesfound) |
| 1147 | return false; |
| 1148 | |
| 1149 | /* |
| 1150 | * All batteries in low/critical capacity and discharging. |
| 1151 | */ |
| 1152 | return true; |
| 1153 | } |
| 1154 | |
| 1155 | static bool |
| 1156 | sme_battery_critical(envsys_data_t *edata) |
| 1157 | { |
| 1158 | if (edata->value_cur == ENVSYS_BATTERY_CAPACITY_CRITICAL || |
| 1159 | edata->value_cur == ENVSYS_BATTERY_CAPACITY_LOW) |
| 1160 | return true; |
| 1161 | |
| 1162 | return false; |
| 1163 | } |
| 1164 | |