173347b07SNate Lawson /*- 20d4ac62aSNate Lawson * Copyright (c) 2004-2007 Nate Lawson (SDG) 373347b07SNate Lawson * All rights reserved. 473347b07SNate Lawson * 573347b07SNate Lawson * Redistribution and use in source and binary forms, with or without 673347b07SNate Lawson * modification, are permitted provided that the following conditions 773347b07SNate Lawson * are met: 873347b07SNate Lawson * 1. Redistributions of source code must retain the above copyright 973347b07SNate Lawson * notice, this list of conditions and the following disclaimer. 1073347b07SNate Lawson * 2. Redistributions in binary form must reproduce the above copyright 1173347b07SNate Lawson * notice, this list of conditions and the following disclaimer in the 1273347b07SNate Lawson * documentation and/or other materials provided with the distribution. 1373347b07SNate Lawson * 1473347b07SNate Lawson * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1573347b07SNate Lawson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1673347b07SNate Lawson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1773347b07SNate Lawson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1873347b07SNate Lawson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1973347b07SNate Lawson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2073347b07SNate Lawson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2173347b07SNate Lawson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2273347b07SNate Lawson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2373347b07SNate Lawson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2473347b07SNate Lawson * SUCH DAMAGE. 2573347b07SNate Lawson */ 2673347b07SNate Lawson 2773347b07SNate Lawson #include <sys/cdefs.h> 2873347b07SNate Lawson __FBSDID("$FreeBSD$"); 2973347b07SNate Lawson 3073347b07SNate Lawson #include <sys/param.h> 3173347b07SNate Lawson #include <sys/bus.h> 3273347b07SNate Lawson #include <sys/cpu.h> 3373347b07SNate Lawson #include <sys/eventhandler.h> 3473347b07SNate Lawson #include <sys/kernel.h> 35789f03ceSNate Lawson #include <sys/lock.h> 3673347b07SNate Lawson #include <sys/malloc.h> 3773347b07SNate Lawson #include <sys/module.h> 3873347b07SNate Lawson #include <sys/proc.h> 3973347b07SNate Lawson #include <sys/queue.h> 40a15e947dSNate Lawson #include <sys/sbuf.h> 4173347b07SNate Lawson #include <sys/sched.h> 42a15e947dSNate Lawson #include <sys/smp.h> 4373347b07SNate Lawson #include <sys/sysctl.h> 4473347b07SNate Lawson #include <sys/systm.h> 45789f03ceSNate Lawson #include <sys/sx.h> 460325089dSNate Lawson #include <sys/timetc.h> 470d4ac62aSNate Lawson #include <sys/taskqueue.h> 4873347b07SNate Lawson 4973347b07SNate Lawson #include "cpufreq_if.h" 5073347b07SNate Lawson 5173347b07SNate Lawson /* 5273347b07SNate Lawson * Common CPU frequency glue code. Drivers for specific hardware can 5373347b07SNate Lawson * attach this interface to allow users to get/set the CPU frequency. 5473347b07SNate Lawson */ 5573347b07SNate Lawson 5673347b07SNate Lawson /* 5773347b07SNate Lawson * Number of levels we can handle. Levels are synthesized from settings 58d269386aSNate Lawson * so for M settings and N drivers, there may be M*N levels. 5973347b07SNate Lawson */ 60d269386aSNate Lawson #define CF_MAX_LEVELS 64 6173347b07SNate Lawson 6256e5a87aSHajimu UMEMOTO struct cf_saved_freq { 6356e5a87aSHajimu UMEMOTO struct cf_level level; 6456e5a87aSHajimu UMEMOTO int priority; 6556e5a87aSHajimu UMEMOTO SLIST_ENTRY(cf_saved_freq) link; 6656e5a87aSHajimu UMEMOTO }; 6756e5a87aSHajimu UMEMOTO 6873347b07SNate Lawson struct cpufreq_softc { 69789f03ceSNate Lawson struct sx lock; 7073347b07SNate Lawson struct cf_level curr_level; 715f0afa04SNate Lawson int curr_priority; 7256e5a87aSHajimu UMEMOTO SLIST_HEAD(, cf_saved_freq) saved_freq; 7373347b07SNate Lawson struct cf_level_lst all_levels; 745f0afa04SNate Lawson int all_count; 7567c8649fSNate Lawson int max_mhz; 7673347b07SNate Lawson device_t dev; 7773347b07SNate Lawson struct sysctl_ctx_list sysctl_ctx; 780d4ac62aSNate Lawson struct task startup_task; 7973347b07SNate Lawson }; 8073347b07SNate Lawson 8173347b07SNate Lawson struct cf_setting_array { 8273347b07SNate Lawson struct cf_setting sets[MAX_SETTINGS]; 8373347b07SNate Lawson int count; 8473347b07SNate Lawson TAILQ_ENTRY(cf_setting_array) link; 8573347b07SNate Lawson }; 8673347b07SNate Lawson 8773347b07SNate Lawson TAILQ_HEAD(cf_setting_lst, cf_setting_array); 8873347b07SNate Lawson 89789f03ceSNate Lawson #define CF_MTX_INIT(x) sx_init((x), "cpufreq lock") 90789f03ceSNate Lawson #define CF_MTX_LOCK(x) sx_xlock((x)) 91789f03ceSNate Lawson #define CF_MTX_UNLOCK(x) sx_xunlock((x)) 92789f03ceSNate Lawson #define CF_MTX_ASSERT(x) sx_assert((x), SX_XLOCKED) 93789f03ceSNate Lawson 948d913481SNate Lawson #define CF_DEBUG(msg...) do { \ 958d913481SNate Lawson if (cf_verbose) \ 968d913481SNate Lawson printf("cpufreq: " msg); \ 978d913481SNate Lawson } while (0) 988d913481SNate Lawson 9973347b07SNate Lawson static int cpufreq_attach(device_t dev); 1000d4ac62aSNate Lawson static void cpufreq_startup_task(void *ctx, int pending); 10173347b07SNate Lawson static int cpufreq_detach(device_t dev); 10273347b07SNate Lawson static int cf_set_method(device_t dev, const struct cf_level *level, 10373347b07SNate Lawson int priority); 10473347b07SNate Lawson static int cf_get_method(device_t dev, struct cf_level *level); 10573347b07SNate Lawson static int cf_levels_method(device_t dev, struct cf_level *levels, 10673347b07SNate Lawson int *count); 10788c9b54cSNate Lawson static int cpufreq_insert_abs(struct cpufreq_softc *sc, 10873347b07SNate Lawson struct cf_setting *sets, int count); 10988c9b54cSNate Lawson static int cpufreq_expand_set(struct cpufreq_softc *sc, 11088c9b54cSNate Lawson struct cf_setting_array *set_arr); 11188c9b54cSNate Lawson static struct cf_level *cpufreq_dup_set(struct cpufreq_softc *sc, 11288c9b54cSNate Lawson struct cf_level *dup, struct cf_setting *set); 11373347b07SNate Lawson static int cpufreq_curr_sysctl(SYSCTL_HANDLER_ARGS); 11473347b07SNate Lawson static int cpufreq_levels_sysctl(SYSCTL_HANDLER_ARGS); 115e959a70bSNate Lawson static int cpufreq_settings_sysctl(SYSCTL_HANDLER_ARGS); 11673347b07SNate Lawson 11773347b07SNate Lawson static device_method_t cpufreq_methods[] = { 11873347b07SNate Lawson DEVMETHOD(device_probe, bus_generic_probe), 11973347b07SNate Lawson DEVMETHOD(device_attach, cpufreq_attach), 12073347b07SNate Lawson DEVMETHOD(device_detach, cpufreq_detach), 12173347b07SNate Lawson 12273347b07SNate Lawson DEVMETHOD(cpufreq_set, cf_set_method), 12373347b07SNate Lawson DEVMETHOD(cpufreq_get, cf_get_method), 12473347b07SNate Lawson DEVMETHOD(cpufreq_levels, cf_levels_method), 12573347b07SNate Lawson {0, 0} 12673347b07SNate Lawson }; 12773347b07SNate Lawson static driver_t cpufreq_driver = { 12873347b07SNate Lawson "cpufreq", cpufreq_methods, sizeof(struct cpufreq_softc) 12973347b07SNate Lawson }; 13073347b07SNate Lawson static devclass_t cpufreq_dc; 13173347b07SNate Lawson DRIVER_MODULE(cpufreq, cpu, cpufreq_driver, cpufreq_dc, 0, 0); 13273347b07SNate Lawson 133b070969bSNate Lawson static int cf_lowest_freq; 1348d913481SNate Lawson static int cf_verbose; 135b070969bSNate Lawson TUNABLE_INT("debug.cpufreq.lowest", &cf_lowest_freq); 1368d913481SNate Lawson TUNABLE_INT("debug.cpufreq.verbose", &cf_verbose); 137b070969bSNate Lawson SYSCTL_NODE(_debug, OID_AUTO, cpufreq, CTLFLAG_RD, NULL, "cpufreq debugging"); 138b070969bSNate Lawson SYSCTL_INT(_debug_cpufreq, OID_AUTO, lowest, CTLFLAG_RW, &cf_lowest_freq, 1, 139b070969bSNate Lawson "Don't provide levels below this frequency."); 1408d913481SNate Lawson SYSCTL_INT(_debug_cpufreq, OID_AUTO, verbose, CTLFLAG_RW, &cf_verbose, 1, 1418d913481SNate Lawson "Print verbose debugging messages"); 142b070969bSNate Lawson 14373347b07SNate Lawson static int 14473347b07SNate Lawson cpufreq_attach(device_t dev) 14573347b07SNate Lawson { 14673347b07SNate Lawson struct cpufreq_softc *sc; 14773347b07SNate Lawson device_t parent; 14873347b07SNate Lawson int numdevs; 14973347b07SNate Lawson 1508d913481SNate Lawson CF_DEBUG("initializing %s\n", device_get_nameunit(dev)); 15173347b07SNate Lawson sc = device_get_softc(dev); 15273347b07SNate Lawson parent = device_get_parent(dev); 15373347b07SNate Lawson sc->dev = dev; 15473347b07SNate Lawson sysctl_ctx_init(&sc->sysctl_ctx); 15573347b07SNate Lawson TAILQ_INIT(&sc->all_levels); 156789f03ceSNate Lawson CF_MTX_INIT(&sc->lock); 15773347b07SNate Lawson sc->curr_level.total_set.freq = CPUFREQ_VAL_UNKNOWN; 15856e5a87aSHajimu UMEMOTO SLIST_INIT(&sc->saved_freq); 15967c8649fSNate Lawson sc->max_mhz = CPUFREQ_VAL_UNKNOWN; 16073347b07SNate Lawson 16173347b07SNate Lawson /* 16273347b07SNate Lawson * Only initialize one set of sysctls for all CPUs. In the future, 16373347b07SNate Lawson * if multiple CPUs can have different settings, we can move these 16473347b07SNate Lawson * sysctls to be under every CPU instead of just the first one. 16573347b07SNate Lawson */ 16673347b07SNate Lawson numdevs = devclass_get_count(cpufreq_dc); 16773347b07SNate Lawson if (numdevs > 1) 16873347b07SNate Lawson return (0); 16973347b07SNate Lawson 1708d913481SNate Lawson CF_DEBUG("initializing one-time data for %s\n", 1718d913481SNate Lawson device_get_nameunit(dev)); 17273347b07SNate Lawson SYSCTL_ADD_PROC(&sc->sysctl_ctx, 17373347b07SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(parent)), 17473347b07SNate Lawson OID_AUTO, "freq", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 17573347b07SNate Lawson cpufreq_curr_sysctl, "I", "Current CPU frequency"); 17673347b07SNate Lawson SYSCTL_ADD_PROC(&sc->sysctl_ctx, 17773347b07SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(parent)), 17873347b07SNate Lawson OID_AUTO, "freq_levels", CTLTYPE_STRING | CTLFLAG_RD, sc, 0, 17973347b07SNate Lawson cpufreq_levels_sysctl, "A", "CPU frequency levels"); 1800d4ac62aSNate Lawson 1810d4ac62aSNate Lawson /* 1820d4ac62aSNate Lawson * Queue a one-shot broadcast that levels have changed. 1830d4ac62aSNate Lawson * It will run once the system has completed booting. 1840d4ac62aSNate Lawson */ 1850d4ac62aSNate Lawson TASK_INIT(&sc->startup_task, 0, cpufreq_startup_task, dev); 1860d4ac62aSNate Lawson taskqueue_enqueue(taskqueue_thread, &sc->startup_task); 18773347b07SNate Lawson 18873347b07SNate Lawson return (0); 18973347b07SNate Lawson } 19073347b07SNate Lawson 1910d4ac62aSNate Lawson /* Handle any work to be done for all drivers that attached during boot. */ 1920d4ac62aSNate Lawson static void 1930d4ac62aSNate Lawson cpufreq_startup_task(void *ctx, int pending) 1940d4ac62aSNate Lawson { 1950d4ac62aSNate Lawson 1960d4ac62aSNate Lawson cpufreq_settings_changed((device_t)ctx); 1970d4ac62aSNate Lawson } 1980d4ac62aSNate Lawson 19973347b07SNate Lawson static int 20073347b07SNate Lawson cpufreq_detach(device_t dev) 20173347b07SNate Lawson { 20273347b07SNate Lawson struct cpufreq_softc *sc; 20356e5a87aSHajimu UMEMOTO struct cf_saved_freq *saved_freq; 20473347b07SNate Lawson int numdevs; 20573347b07SNate Lawson 2068d913481SNate Lawson CF_DEBUG("shutdown %s\n", device_get_nameunit(dev)); 20773347b07SNate Lawson sc = device_get_softc(dev); 20873347b07SNate Lawson sysctl_ctx_free(&sc->sysctl_ctx); 20973347b07SNate Lawson 21056e5a87aSHajimu UMEMOTO while ((saved_freq = SLIST_FIRST(&sc->saved_freq)) != NULL) { 21156e5a87aSHajimu UMEMOTO SLIST_REMOVE_HEAD(&sc->saved_freq, link); 21256e5a87aSHajimu UMEMOTO free(saved_freq, M_TEMP); 21356e5a87aSHajimu UMEMOTO } 21456e5a87aSHajimu UMEMOTO 21573347b07SNate Lawson /* Only clean up these resources when the last device is detaching. */ 21673347b07SNate Lawson numdevs = devclass_get_count(cpufreq_dc); 2178d913481SNate Lawson if (numdevs == 1) { 2188d913481SNate Lawson CF_DEBUG("final shutdown for %s\n", device_get_nameunit(dev)); 2198d913481SNate Lawson } 22073347b07SNate Lawson 22173347b07SNate Lawson return (0); 22273347b07SNate Lawson } 22373347b07SNate Lawson 22473347b07SNate Lawson static int 22573347b07SNate Lawson cf_set_method(device_t dev, const struct cf_level *level, int priority) 22673347b07SNate Lawson { 22773347b07SNate Lawson struct cpufreq_softc *sc; 22873347b07SNate Lawson const struct cf_setting *set; 22956e5a87aSHajimu UMEMOTO struct cf_saved_freq *saved_freq, *curr_freq; 2300325089dSNate Lawson struct pcpu *pc; 23162db376aSNate Lawson int error, i; 23273347b07SNate Lawson 23373347b07SNate Lawson sc = device_get_softc(dev); 234789f03ceSNate Lawson error = 0; 235789f03ceSNate Lawson set = NULL; 23656e5a87aSHajimu UMEMOTO saved_freq = NULL; 23773347b07SNate Lawson 2380d4ac62aSNate Lawson /* We are going to change levels so notify the pre-change handler. */ 2390d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_pre_change, level, &error); 2400d4ac62aSNate Lawson if (error != 0) { 2410d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_post_change, level, error); 2420d4ac62aSNate Lawson return (error); 243b4130b8aSMarcus Alves Grando } 2440325089dSNate Lawson 245789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 24656e5a87aSHajimu UMEMOTO 247a15e947dSNate Lawson #ifdef SMP 248a15e947dSNate Lawson /* 249a15e947dSNate Lawson * If still booting and secondary CPUs not started yet, don't allow 250a15e947dSNate Lawson * changing the frequency until they're online. This is because we 251a15e947dSNate Lawson * can't switch to them using sched_bind() and thus we'd only be 252a15e947dSNate Lawson * switching the main CPU. XXXTODO: Need to think more about how to 253a15e947dSNate Lawson * handle having different CPUs at different frequencies. 254a15e947dSNate Lawson */ 255a15e947dSNate Lawson if (mp_ncpus > 1 && !smp_active) { 256a15e947dSNate Lawson device_printf(dev, "rejecting change, SMP not started yet\n"); 257a15e947dSNate Lawson error = ENXIO; 258a15e947dSNate Lawson goto out; 259a15e947dSNate Lawson } 260a15e947dSNate Lawson #endif /* SMP */ 261a15e947dSNate Lawson 26256e5a87aSHajimu UMEMOTO /* 26356e5a87aSHajimu UMEMOTO * If the requested level has a lower priority, don't allow 26456e5a87aSHajimu UMEMOTO * the new level right now. 26556e5a87aSHajimu UMEMOTO */ 26656e5a87aSHajimu UMEMOTO if (priority < sc->curr_priority) { 2678d913481SNate Lawson CF_DEBUG("ignoring, curr prio %d less than %d\n", priority, 2688d913481SNate Lawson sc->curr_priority); 269789f03ceSNate Lawson error = EPERM; 270789f03ceSNate Lawson goto out; 271789f03ceSNate Lawson } 2725f0afa04SNate Lawson 27356e5a87aSHajimu UMEMOTO /* 27456e5a87aSHajimu UMEMOTO * If the caller didn't specify a level and one is saved, prepare to 27556e5a87aSHajimu UMEMOTO * restore the saved level. If none has been saved, return an error. 27656e5a87aSHajimu UMEMOTO */ 27756e5a87aSHajimu UMEMOTO if (level == NULL) { 27856e5a87aSHajimu UMEMOTO saved_freq = SLIST_FIRST(&sc->saved_freq); 27956e5a87aSHajimu UMEMOTO if (saved_freq == NULL) { 28056e5a87aSHajimu UMEMOTO CF_DEBUG("NULL level, no saved level\n"); 28156e5a87aSHajimu UMEMOTO error = ENXIO; 28256e5a87aSHajimu UMEMOTO goto out; 28356e5a87aSHajimu UMEMOTO } 28456e5a87aSHajimu UMEMOTO level = &saved_freq->level; 28556e5a87aSHajimu UMEMOTO priority = saved_freq->priority; 28656e5a87aSHajimu UMEMOTO CF_DEBUG("restoring saved level, freq %d prio %d\n", 28756e5a87aSHajimu UMEMOTO level->total_set.freq, priority); 28856e5a87aSHajimu UMEMOTO } 28956e5a87aSHajimu UMEMOTO 290b070969bSNate Lawson /* Reject levels that are below our specified threshold. */ 291da8a77c1SNate Lawson if (level->total_set.freq < cf_lowest_freq) { 2928d913481SNate Lawson CF_DEBUG("rejecting freq %d, less than %d limit\n", 2938d913481SNate Lawson level->total_set.freq, cf_lowest_freq); 294789f03ceSNate Lawson error = EINVAL; 295789f03ceSNate Lawson goto out; 296789f03ceSNate Lawson } 297b070969bSNate Lawson 29873347b07SNate Lawson /* If already at this level, just return. */ 2998d913481SNate Lawson if (CPUFREQ_CMP(sc->curr_level.total_set.freq, level->total_set.freq)) { 3008d913481SNate Lawson CF_DEBUG("skipping freq %d, same as current level %d\n", 3018d913481SNate Lawson level->total_set.freq, sc->curr_level.total_set.freq); 3021fea6ce7SHajimu UMEMOTO goto skip; 3038d913481SNate Lawson } 30473347b07SNate Lawson 30573347b07SNate Lawson /* First, set the absolute frequency via its driver. */ 30673347b07SNate Lawson set = &level->abs_set; 30773347b07SNate Lawson if (set->dev) { 30873347b07SNate Lawson if (!device_is_attached(set->dev)) { 30973347b07SNate Lawson error = ENXIO; 31073347b07SNate Lawson goto out; 31173347b07SNate Lawson } 3121196826aSNate Lawson 31362db376aSNate Lawson /* Bind to the target CPU before switching. */ 3141196826aSNate Lawson pc = cpu_get_pcpu(set->dev); 315982d11f8SJeff Roberson thread_lock(curthread); 3161196826aSNate Lawson sched_bind(curthread, pc->pc_cpuid); 317982d11f8SJeff Roberson thread_unlock(curthread); 3188d913481SNate Lawson CF_DEBUG("setting abs freq %d on %s (cpu %d)\n", set->freq, 3198d913481SNate Lawson device_get_nameunit(set->dev), PCPU_GET(cpuid)); 32073347b07SNate Lawson error = CPUFREQ_DRV_SET(set->dev, set); 321982d11f8SJeff Roberson thread_lock(curthread); 3221196826aSNate Lawson sched_unbind(curthread); 323982d11f8SJeff Roberson thread_unlock(curthread); 32473347b07SNate Lawson if (error) { 32573347b07SNate Lawson goto out; 32673347b07SNate Lawson } 32773347b07SNate Lawson } 32873347b07SNate Lawson 32988c9b54cSNate Lawson /* Next, set any/all relative frequencies via their drivers. */ 33088c9b54cSNate Lawson for (i = 0; i < level->rel_count; i++) { 33188c9b54cSNate Lawson set = &level->rel_set[i]; 33288c9b54cSNate Lawson if (!device_is_attached(set->dev)) { 33388c9b54cSNate Lawson error = ENXIO; 33488c9b54cSNate Lawson goto out; 33588c9b54cSNate Lawson } 3361196826aSNate Lawson 33762db376aSNate Lawson /* Bind to the target CPU before switching. */ 3381196826aSNate Lawson pc = cpu_get_pcpu(set->dev); 339982d11f8SJeff Roberson thread_lock(curthread); 3401196826aSNate Lawson sched_bind(curthread, pc->pc_cpuid); 341982d11f8SJeff Roberson thread_unlock(curthread); 3428d913481SNate Lawson CF_DEBUG("setting rel freq %d on %s (cpu %d)\n", set->freq, 3438d913481SNate Lawson device_get_nameunit(set->dev), PCPU_GET(cpuid)); 34488c9b54cSNate Lawson error = CPUFREQ_DRV_SET(set->dev, set); 345982d11f8SJeff Roberson thread_lock(curthread); 3461196826aSNate Lawson sched_unbind(curthread); 347982d11f8SJeff Roberson thread_unlock(curthread); 34888c9b54cSNate Lawson if (error) { 34988c9b54cSNate Lawson /* XXX Back out any successful setting? */ 35088c9b54cSNate Lawson goto out; 35188c9b54cSNate Lawson } 35288c9b54cSNate Lawson } 35373347b07SNate Lawson 3541fea6ce7SHajimu UMEMOTO skip: 3555f0afa04SNate Lawson /* 3565f0afa04SNate Lawson * Before recording the current level, check if we're going to a 35756e5a87aSHajimu UMEMOTO * higher priority. If so, save the previous level and priority. 3585f0afa04SNate Lawson */ 3595f0afa04SNate Lawson if (sc->curr_level.total_set.freq != CPUFREQ_VAL_UNKNOWN && 36056e5a87aSHajimu UMEMOTO priority > sc->curr_priority) { 3618d913481SNate Lawson CF_DEBUG("saving level, freq %d prio %d\n", 3628d913481SNate Lawson sc->curr_level.total_set.freq, sc->curr_priority); 36356e5a87aSHajimu UMEMOTO curr_freq = malloc(sizeof(*curr_freq), M_TEMP, M_NOWAIT); 36456e5a87aSHajimu UMEMOTO if (curr_freq == NULL) { 36556e5a87aSHajimu UMEMOTO error = ENOMEM; 36656e5a87aSHajimu UMEMOTO goto out; 36756e5a87aSHajimu UMEMOTO } 36856e5a87aSHajimu UMEMOTO curr_freq->level = sc->curr_level; 36956e5a87aSHajimu UMEMOTO curr_freq->priority = sc->curr_priority; 37056e5a87aSHajimu UMEMOTO SLIST_INSERT_HEAD(&sc->saved_freq, curr_freq, link); 3715f0afa04SNate Lawson } 37273347b07SNate Lawson sc->curr_level = *level; 3735f0afa04SNate Lawson sc->curr_priority = priority; 37473347b07SNate Lawson 37556e5a87aSHajimu UMEMOTO /* If we were restoring a saved state, reset it to "unused". */ 37656e5a87aSHajimu UMEMOTO if (saved_freq != NULL) { 37756e5a87aSHajimu UMEMOTO CF_DEBUG("resetting saved level\n"); 37856e5a87aSHajimu UMEMOTO sc->curr_level.total_set.freq = CPUFREQ_VAL_UNKNOWN; 37956e5a87aSHajimu UMEMOTO SLIST_REMOVE_HEAD(&sc->saved_freq, link); 38056e5a87aSHajimu UMEMOTO free(saved_freq, M_TEMP); 38156e5a87aSHajimu UMEMOTO } 38256e5a87aSHajimu UMEMOTO 38373347b07SNate Lawson out: 384789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 3850d4ac62aSNate Lawson 3860d4ac62aSNate Lawson /* 3870d4ac62aSNate Lawson * We changed levels (or attempted to) so notify the post-change 3880d4ac62aSNate Lawson * handler of new frequency or error. 3890d4ac62aSNate Lawson */ 3900d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_post_change, level, error); 391789f03ceSNate Lawson if (error && set) 39273347b07SNate Lawson device_printf(set->dev, "set freq failed, err %d\n", error); 3930d4ac62aSNate Lawson 39473347b07SNate Lawson return (error); 39573347b07SNate Lawson } 39673347b07SNate Lawson 39773347b07SNate Lawson static int 39873347b07SNate Lawson cf_get_method(device_t dev, struct cf_level *level) 39973347b07SNate Lawson { 40073347b07SNate Lawson struct cpufreq_softc *sc; 40173347b07SNate Lawson struct cf_level *levels; 40273347b07SNate Lawson struct cf_setting *curr_set, set; 40373347b07SNate Lawson struct pcpu *pc; 40473347b07SNate Lawson device_t *devs; 4052145b9d2SNate Lawson int count, error, i, n, numdevs; 40673347b07SNate Lawson uint64_t rate; 40773347b07SNate Lawson 40873347b07SNate Lawson sc = device_get_softc(dev); 409789f03ceSNate Lawson error = 0; 41073347b07SNate Lawson levels = NULL; 41173347b07SNate Lawson 41273347b07SNate Lawson /* If we already know the current frequency, we're done. */ 413789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 414789f03ceSNate Lawson curr_set = &sc->curr_level.total_set; 4158d913481SNate Lawson if (curr_set->freq != CPUFREQ_VAL_UNKNOWN) { 4168d913481SNate Lawson CF_DEBUG("get returning known freq %d\n", curr_set->freq); 41773347b07SNate Lawson goto out; 4188d913481SNate Lawson } 419789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 42073347b07SNate Lawson 42173347b07SNate Lawson /* 42273347b07SNate Lawson * We need to figure out the current level. Loop through every 42373347b07SNate Lawson * driver, getting the current setting. Then, attempt to get a best 42473347b07SNate Lawson * match of settings against each level. 42573347b07SNate Lawson */ 42673347b07SNate Lawson count = CF_MAX_LEVELS; 42773347b07SNate Lawson levels = malloc(count * sizeof(*levels), M_TEMP, M_NOWAIT); 42873347b07SNate Lawson if (levels == NULL) 42973347b07SNate Lawson return (ENOMEM); 43073347b07SNate Lawson error = CPUFREQ_LEVELS(sc->dev, levels, &count); 431d269386aSNate Lawson if (error) { 432d269386aSNate Lawson if (error == E2BIG) 433d269386aSNate Lawson printf("cpufreq: need to increase CF_MAX_LEVELS\n"); 434789f03ceSNate Lawson free(levels, M_TEMP); 435789f03ceSNate Lawson return (error); 436d269386aSNate Lawson } 43773347b07SNate Lawson error = device_get_children(device_get_parent(dev), &devs, &numdevs); 438789f03ceSNate Lawson if (error) { 439789f03ceSNate Lawson free(levels, M_TEMP); 440789f03ceSNate Lawson return (error); 441789f03ceSNate Lawson } 442789f03ceSNate Lawson 443789f03ceSNate Lawson /* 444789f03ceSNate Lawson * Reacquire the lock and search for the given level. 445789f03ceSNate Lawson * 446789f03ceSNate Lawson * XXX Note: this is not quite right since we really need to go 447789f03ceSNate Lawson * through each level and compare both absolute and relative 448789f03ceSNate Lawson * settings for each driver in the system before making a match. 449789f03ceSNate Lawson * The estimation code below catches this case though. 450789f03ceSNate Lawson */ 451789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 4522145b9d2SNate Lawson for (n = 0; n < numdevs && curr_set->freq == CPUFREQ_VAL_UNKNOWN; n++) { 4532145b9d2SNate Lawson if (!device_is_attached(devs[n])) 45473347b07SNate Lawson continue; 4552145b9d2SNate Lawson error = CPUFREQ_DRV_GET(devs[n], &set); 45673347b07SNate Lawson if (error) 45773347b07SNate Lawson continue; 45873347b07SNate Lawson for (i = 0; i < count; i++) { 45988c9b54cSNate Lawson if (CPUFREQ_CMP(set.freq, levels[i].total_set.freq)) { 46073347b07SNate Lawson sc->curr_level = levels[i]; 46173347b07SNate Lawson break; 46273347b07SNate Lawson } 46373347b07SNate Lawson } 46473347b07SNate Lawson } 46573347b07SNate Lawson free(devs, M_TEMP); 4668d913481SNate Lawson if (curr_set->freq != CPUFREQ_VAL_UNKNOWN) { 4678d913481SNate Lawson CF_DEBUG("get matched freq %d from drivers\n", curr_set->freq); 46873347b07SNate Lawson goto out; 4698d913481SNate Lawson } 47073347b07SNate Lawson 47173347b07SNate Lawson /* 47273347b07SNate Lawson * We couldn't find an exact match, so attempt to estimate and then 47373347b07SNate Lawson * match against a level. 47473347b07SNate Lawson */ 47573347b07SNate Lawson pc = cpu_get_pcpu(dev); 47673347b07SNate Lawson if (pc == NULL) { 47773347b07SNate Lawson error = ENXIO; 47873347b07SNate Lawson goto out; 47973347b07SNate Lawson } 48073347b07SNate Lawson cpu_est_clockrate(pc->pc_cpuid, &rate); 48173347b07SNate Lawson rate /= 1000000; 48273347b07SNate Lawson for (i = 0; i < count; i++) { 48373347b07SNate Lawson if (CPUFREQ_CMP(rate, levels[i].total_set.freq)) { 48473347b07SNate Lawson sc->curr_level = levels[i]; 4858d913481SNate Lawson CF_DEBUG("get estimated freq %d\n", curr_set->freq); 48673347b07SNate Lawson break; 48773347b07SNate Lawson } 48873347b07SNate Lawson } 48973347b07SNate Lawson 49073347b07SNate Lawson out: 491789f03ceSNate Lawson if (error == 0) 492789f03ceSNate Lawson *level = sc->curr_level; 493789f03ceSNate Lawson 494789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 49573347b07SNate Lawson if (levels) 49673347b07SNate Lawson free(levels, M_TEMP); 497789f03ceSNate Lawson return (error); 49873347b07SNate Lawson } 49973347b07SNate Lawson 50073347b07SNate Lawson static int 50173347b07SNate Lawson cf_levels_method(device_t dev, struct cf_level *levels, int *count) 50273347b07SNate Lawson { 50388c9b54cSNate Lawson struct cf_setting_array *set_arr; 50473347b07SNate Lawson struct cf_setting_lst rel_sets; 50573347b07SNate Lawson struct cpufreq_softc *sc; 50673347b07SNate Lawson struct cf_level *lev; 50773347b07SNate Lawson struct cf_setting *sets; 50873347b07SNate Lawson struct pcpu *pc; 50973347b07SNate Lawson device_t *devs; 51088c9b54cSNate Lawson int error, i, numdevs, set_count, type; 51173347b07SNate Lawson uint64_t rate; 51273347b07SNate Lawson 51373347b07SNate Lawson if (levels == NULL || count == NULL) 51473347b07SNate Lawson return (EINVAL); 51573347b07SNate Lawson 51673347b07SNate Lawson TAILQ_INIT(&rel_sets); 51773347b07SNate Lawson sc = device_get_softc(dev); 51873347b07SNate Lawson error = device_get_children(device_get_parent(dev), &devs, &numdevs); 51973347b07SNate Lawson if (error) 52073347b07SNate Lawson return (error); 52173347b07SNate Lawson sets = malloc(MAX_SETTINGS * sizeof(*sets), M_TEMP, M_NOWAIT); 52273347b07SNate Lawson if (sets == NULL) { 52373347b07SNate Lawson free(devs, M_TEMP); 52473347b07SNate Lawson return (ENOMEM); 52573347b07SNate Lawson } 52673347b07SNate Lawson 52773347b07SNate Lawson /* Get settings from all cpufreq drivers. */ 528789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 52973347b07SNate Lawson for (i = 0; i < numdevs; i++) { 530e22cd41cSNate Lawson /* Skip devices that aren't ready. */ 53173347b07SNate Lawson if (!device_is_attached(devs[i])) 53273347b07SNate Lawson continue; 533e22cd41cSNate Lawson 534e22cd41cSNate Lawson /* 535e22cd41cSNate Lawson * Get settings, skipping drivers that offer no settings or 536e22cd41cSNate Lawson * provide settings for informational purposes only. 537e22cd41cSNate Lawson */ 538e94a0c1aSNate Lawson error = CPUFREQ_DRV_TYPE(devs[i], &type); 5398d913481SNate Lawson if (error || (type & CPUFREQ_FLAG_INFO_ONLY)) { 5408d913481SNate Lawson if (error == 0) { 5418d913481SNate Lawson CF_DEBUG("skipping info-only driver %s\n", 5428d913481SNate Lawson device_get_nameunit(devs[i])); 5438d913481SNate Lawson } 544e94a0c1aSNate Lawson continue; 5458d913481SNate Lawson } 54673347b07SNate Lawson set_count = MAX_SETTINGS; 547e94a0c1aSNate Lawson error = CPUFREQ_DRV_SETTINGS(devs[i], sets, &set_count); 548e94a0c1aSNate Lawson if (error || set_count == 0) 54973347b07SNate Lawson continue; 55073347b07SNate Lawson 551e22cd41cSNate Lawson /* Add the settings to our absolute/relative lists. */ 5520325089dSNate Lawson switch (type & CPUFREQ_TYPE_MASK) { 55388c9b54cSNate Lawson case CPUFREQ_TYPE_ABSOLUTE: 55488c9b54cSNate Lawson error = cpufreq_insert_abs(sc, sets, set_count); 55588c9b54cSNate Lawson break; 55688c9b54cSNate Lawson case CPUFREQ_TYPE_RELATIVE: 5578d913481SNate Lawson CF_DEBUG("adding %d relative settings\n", set_count); 55888c9b54cSNate Lawson set_arr = malloc(sizeof(*set_arr), M_TEMP, M_NOWAIT); 55988c9b54cSNate Lawson if (set_arr == NULL) { 56088c9b54cSNate Lawson error = ENOMEM; 56188c9b54cSNate Lawson goto out; 56288c9b54cSNate Lawson } 56388c9b54cSNate Lawson bcopy(sets, set_arr->sets, set_count * sizeof(*sets)); 56488c9b54cSNate Lawson set_arr->count = set_count; 56588c9b54cSNate Lawson TAILQ_INSERT_TAIL(&rel_sets, set_arr, link); 56688c9b54cSNate Lawson break; 56788c9b54cSNate Lawson default: 56888c9b54cSNate Lawson error = EINVAL; 56988c9b54cSNate Lawson } 57088c9b54cSNate Lawson if (error) 57173347b07SNate Lawson goto out; 57273347b07SNate Lawson } 57373347b07SNate Lawson 57467c8649fSNate Lawson /* 57567c8649fSNate Lawson * If there are no absolute levels, create a fake one at 100%. We 57667c8649fSNate Lawson * then cache the clockrate for later use as our base frequency. 57767c8649fSNate Lawson * 57867c8649fSNate Lawson * XXX This assumes that the first time through, if we only have 57967c8649fSNate Lawson * relative drivers, the CPU is currently running at 100%. 58067c8649fSNate Lawson */ 58173347b07SNate Lawson if (TAILQ_EMPTY(&sc->all_levels)) { 58267c8649fSNate Lawson if (sc->max_mhz == CPUFREQ_VAL_UNKNOWN) { 58373347b07SNate Lawson pc = cpu_get_pcpu(dev); 58473347b07SNate Lawson cpu_est_clockrate(pc->pc_cpuid, &rate); 58567c8649fSNate Lawson sc->max_mhz = rate / 1000000; 58667c8649fSNate Lawson } 58767c8649fSNate Lawson memset(&sets[0], CPUFREQ_VAL_UNKNOWN, sizeof(*sets)); 58867c8649fSNate Lawson sets[0].freq = sc->max_mhz; 58967c8649fSNate Lawson sets[0].dev = NULL; 59088c9b54cSNate Lawson error = cpufreq_insert_abs(sc, sets, 1); 59173347b07SNate Lawson if (error) 59273347b07SNate Lawson goto out; 59373347b07SNate Lawson } 59473347b07SNate Lawson 59588c9b54cSNate Lawson /* Create a combined list of absolute + relative levels. */ 59688c9b54cSNate Lawson TAILQ_FOREACH(set_arr, &rel_sets, link) 59788c9b54cSNate Lawson cpufreq_expand_set(sc, set_arr); 59888c9b54cSNate Lawson 59988c9b54cSNate Lawson /* If the caller doesn't have enough space, return the actual count. */ 60088c9b54cSNate Lawson if (sc->all_count > *count) { 60188c9b54cSNate Lawson *count = sc->all_count; 60288c9b54cSNate Lawson error = E2BIG; 60388c9b54cSNate Lawson goto out; 60488c9b54cSNate Lawson } 60588c9b54cSNate Lawson 60688c9b54cSNate Lawson /* Finally, output the list of levels. */ 60773347b07SNate Lawson i = 0; 60873347b07SNate Lawson TAILQ_FOREACH(lev, &sc->all_levels, link) { 609b070969bSNate Lawson /* Skip levels that have a frequency that is too low. */ 610da8a77c1SNate Lawson if (lev->total_set.freq < cf_lowest_freq) { 611b070969bSNate Lawson sc->all_count--; 612b070969bSNate Lawson continue; 613b070969bSNate Lawson } 614b070969bSNate Lawson 61573347b07SNate Lawson levels[i] = *lev; 61673347b07SNate Lawson i++; 61773347b07SNate Lawson } 61888c9b54cSNate Lawson *count = sc->all_count; 61973347b07SNate Lawson error = 0; 62073347b07SNate Lawson 62173347b07SNate Lawson out: 62273347b07SNate Lawson /* Clear all levels since we regenerate them each time. */ 62373347b07SNate Lawson while ((lev = TAILQ_FIRST(&sc->all_levels)) != NULL) { 62473347b07SNate Lawson TAILQ_REMOVE(&sc->all_levels, lev, link); 62573347b07SNate Lawson free(lev, M_TEMP); 62673347b07SNate Lawson } 627789f03ceSNate Lawson sc->all_count = 0; 628789f03ceSNate Lawson 629789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 63088c9b54cSNate Lawson while ((set_arr = TAILQ_FIRST(&rel_sets)) != NULL) { 63188c9b54cSNate Lawson TAILQ_REMOVE(&rel_sets, set_arr, link); 63288c9b54cSNate Lawson free(set_arr, M_TEMP); 63388c9b54cSNate Lawson } 63473347b07SNate Lawson free(devs, M_TEMP); 63573347b07SNate Lawson free(sets, M_TEMP); 63673347b07SNate Lawson return (error); 63773347b07SNate Lawson } 63873347b07SNate Lawson 63973347b07SNate Lawson /* 64073347b07SNate Lawson * Create levels for an array of absolute settings and insert them in 64173347b07SNate Lawson * sorted order in the specified list. 64273347b07SNate Lawson */ 64373347b07SNate Lawson static int 64488c9b54cSNate Lawson cpufreq_insert_abs(struct cpufreq_softc *sc, struct cf_setting *sets, 64573347b07SNate Lawson int count) 64673347b07SNate Lawson { 64788c9b54cSNate Lawson struct cf_level_lst *list; 64873347b07SNate Lawson struct cf_level *level, *search; 64973347b07SNate Lawson int i; 65073347b07SNate Lawson 651789f03ceSNate Lawson CF_MTX_ASSERT(&sc->lock); 652789f03ceSNate Lawson 65388c9b54cSNate Lawson list = &sc->all_levels; 65473347b07SNate Lawson for (i = 0; i < count; i++) { 65573347b07SNate Lawson level = malloc(sizeof(*level), M_TEMP, M_NOWAIT | M_ZERO); 65673347b07SNate Lawson if (level == NULL) 65773347b07SNate Lawson return (ENOMEM); 65873347b07SNate Lawson level->abs_set = sets[i]; 65988c9b54cSNate Lawson level->total_set = sets[i]; 66088c9b54cSNate Lawson level->total_set.dev = NULL; 66188c9b54cSNate Lawson sc->all_count++; 66273347b07SNate Lawson 66373347b07SNate Lawson if (TAILQ_EMPTY(list)) { 6648d913481SNate Lawson CF_DEBUG("adding abs setting %d at head\n", 6658d913481SNate Lawson sets[i].freq); 66673347b07SNate Lawson TAILQ_INSERT_HEAD(list, level, link); 66773347b07SNate Lawson continue; 66873347b07SNate Lawson } 66973347b07SNate Lawson 67073347b07SNate Lawson TAILQ_FOREACH_REVERSE(search, list, cf_level_lst, link) { 67188c9b54cSNate Lawson if (sets[i].freq <= search->total_set.freq) { 6728d913481SNate Lawson CF_DEBUG("adding abs setting %d after %d\n", 6738d913481SNate Lawson sets[i].freq, search->total_set.freq); 67473347b07SNate Lawson TAILQ_INSERT_AFTER(list, search, level, link); 67573347b07SNate Lawson break; 67673347b07SNate Lawson } 67773347b07SNate Lawson } 67873347b07SNate Lawson } 67973347b07SNate Lawson return (0); 68073347b07SNate Lawson } 68173347b07SNate Lawson 68288c9b54cSNate Lawson /* 68388c9b54cSNate Lawson * Expand a group of relative settings, creating derived levels from them. 68488c9b54cSNate Lawson */ 68588c9b54cSNate Lawson static int 68688c9b54cSNate Lawson cpufreq_expand_set(struct cpufreq_softc *sc, struct cf_setting_array *set_arr) 68788c9b54cSNate Lawson { 68888c9b54cSNate Lawson struct cf_level *fill, *search; 68988c9b54cSNate Lawson struct cf_setting *set; 69088c9b54cSNate Lawson int i; 69188c9b54cSNate Lawson 692789f03ceSNate Lawson CF_MTX_ASSERT(&sc->lock); 693789f03ceSNate Lawson 6945308b2a6SNate Lawson /* 6955308b2a6SNate Lawson * Walk the set of all existing levels in reverse. This is so we 6965308b2a6SNate Lawson * create derived states from the lowest absolute settings first 6975308b2a6SNate Lawson * and discard duplicates created from higher absolute settings. 6985308b2a6SNate Lawson * For instance, a level of 50 Mhz derived from 100 Mhz + 50% is 6995308b2a6SNate Lawson * preferable to 200 Mhz + 25% because absolute settings are more 7005308b2a6SNate Lawson * efficient since they often change the voltage as well. 7015308b2a6SNate Lawson */ 7025308b2a6SNate Lawson TAILQ_FOREACH_REVERSE(search, &sc->all_levels, cf_level_lst, link) { 70388c9b54cSNate Lawson /* Add each setting to the level, duplicating if necessary. */ 70488c9b54cSNate Lawson for (i = 0; i < set_arr->count; i++) { 70588c9b54cSNate Lawson set = &set_arr->sets[i]; 70688c9b54cSNate Lawson 70788c9b54cSNate Lawson /* 70888c9b54cSNate Lawson * If this setting is less than 100%, split the level 70988c9b54cSNate Lawson * into two and add this setting to the new level. 71088c9b54cSNate Lawson */ 71188c9b54cSNate Lawson fill = search; 7125308b2a6SNate Lawson if (set->freq < 10000) { 71388c9b54cSNate Lawson fill = cpufreq_dup_set(sc, search, set); 71488c9b54cSNate Lawson 71588c9b54cSNate Lawson /* 7165308b2a6SNate Lawson * The new level was a duplicate of an existing 7175308b2a6SNate Lawson * level or its absolute setting is too high 7185308b2a6SNate Lawson * so we freed it. For example, we discard a 7195308b2a6SNate Lawson * derived level of 1000 MHz/25% if a level 7205308b2a6SNate Lawson * of 500 MHz/100% already exists. 72188c9b54cSNate Lawson */ 72288c9b54cSNate Lawson if (fill == NULL) 7235308b2a6SNate Lawson break; 7245308b2a6SNate Lawson } 72588c9b54cSNate Lawson 72688c9b54cSNate Lawson /* Add this setting to the existing or new level. */ 72788c9b54cSNate Lawson KASSERT(fill->rel_count < MAX_SETTINGS, 72888c9b54cSNate Lawson ("cpufreq: too many relative drivers (%d)", 72988c9b54cSNate Lawson MAX_SETTINGS)); 73088c9b54cSNate Lawson fill->rel_set[fill->rel_count] = *set; 73188c9b54cSNate Lawson fill->rel_count++; 7328d913481SNate Lawson CF_DEBUG( 7338d913481SNate Lawson "expand set added rel setting %d%% to %d level\n", 7348d913481SNate Lawson set->freq / 100, fill->total_set.freq); 73588c9b54cSNate Lawson } 73688c9b54cSNate Lawson } 73788c9b54cSNate Lawson 73888c9b54cSNate Lawson return (0); 73988c9b54cSNate Lawson } 74088c9b54cSNate Lawson 74188c9b54cSNate Lawson static struct cf_level * 74288c9b54cSNate Lawson cpufreq_dup_set(struct cpufreq_softc *sc, struct cf_level *dup, 74388c9b54cSNate Lawson struct cf_setting *set) 74488c9b54cSNate Lawson { 74588c9b54cSNate Lawson struct cf_level_lst *list; 74688c9b54cSNate Lawson struct cf_level *fill, *itr; 74788c9b54cSNate Lawson struct cf_setting *fill_set, *itr_set; 74888c9b54cSNate Lawson int i; 74988c9b54cSNate Lawson 750789f03ceSNate Lawson CF_MTX_ASSERT(&sc->lock); 751789f03ceSNate Lawson 75288c9b54cSNate Lawson /* 75388c9b54cSNate Lawson * Create a new level, copy it from the old one, and update the 75488c9b54cSNate Lawson * total frequency and power by the percentage specified in the 75588c9b54cSNate Lawson * relative setting. 75688c9b54cSNate Lawson */ 75788c9b54cSNate Lawson fill = malloc(sizeof(*fill), M_TEMP, M_NOWAIT); 75888c9b54cSNate Lawson if (fill == NULL) 75988c9b54cSNate Lawson return (NULL); 76088c9b54cSNate Lawson *fill = *dup; 76188c9b54cSNate Lawson fill_set = &fill->total_set; 76288c9b54cSNate Lawson fill_set->freq = 76388c9b54cSNate Lawson ((uint64_t)fill_set->freq * set->freq) / 10000; 76488c9b54cSNate Lawson if (fill_set->power != CPUFREQ_VAL_UNKNOWN) { 76588c9b54cSNate Lawson fill_set->power = ((uint64_t)fill_set->power * set->freq) 76688c9b54cSNate Lawson / 10000; 76788c9b54cSNate Lawson } 76888c9b54cSNate Lawson if (set->lat != CPUFREQ_VAL_UNKNOWN) { 76988c9b54cSNate Lawson if (fill_set->lat != CPUFREQ_VAL_UNKNOWN) 77088c9b54cSNate Lawson fill_set->lat += set->lat; 77188c9b54cSNate Lawson else 77288c9b54cSNate Lawson fill_set->lat = set->lat; 77388c9b54cSNate Lawson } 7748d913481SNate Lawson CF_DEBUG("dup set considering derived setting %d\n", fill_set->freq); 77588c9b54cSNate Lawson 77688c9b54cSNate Lawson /* 77788c9b54cSNate Lawson * If we copied an old level that we already modified (say, at 100%), 77888c9b54cSNate Lawson * we need to remove that setting before adding this one. Since we 77988c9b54cSNate Lawson * process each setting array in order, we know any settings for this 78088c9b54cSNate Lawson * driver will be found at the end. 78188c9b54cSNate Lawson */ 78288c9b54cSNate Lawson for (i = fill->rel_count; i != 0; i--) { 78388c9b54cSNate Lawson if (fill->rel_set[i - 1].dev != set->dev) 78488c9b54cSNate Lawson break; 7858d913481SNate Lawson CF_DEBUG("removed last relative driver: %s\n", 7868d913481SNate Lawson device_get_nameunit(set->dev)); 78788c9b54cSNate Lawson fill->rel_count--; 78888c9b54cSNate Lawson } 78988c9b54cSNate Lawson 79088c9b54cSNate Lawson /* 7915308b2a6SNate Lawson * Insert the new level in sorted order. If it is a duplicate of an 7925308b2a6SNate Lawson * existing level (1) or has an absolute setting higher than the 7935308b2a6SNate Lawson * existing level (2), do not add it. We can do this since any such 7945308b2a6SNate Lawson * level is guaranteed use less power. For example (1), a level with 7955308b2a6SNate Lawson * one absolute setting of 800 Mhz uses less power than one composed 7965308b2a6SNate Lawson * of an absolute setting of 1600 Mhz and a relative setting at 50%. 7975308b2a6SNate Lawson * Also for example (2), a level of 800 Mhz/75% is preferable to 7985308b2a6SNate Lawson * 1600 Mhz/25% even though the latter has a lower total frequency. 79988c9b54cSNate Lawson */ 80088c9b54cSNate Lawson list = &sc->all_levels; 8015308b2a6SNate Lawson KASSERT(!TAILQ_EMPTY(list), ("all levels list empty in dup set")); 80288c9b54cSNate Lawson TAILQ_FOREACH_REVERSE(itr, list, cf_level_lst, link) { 80388c9b54cSNate Lawson itr_set = &itr->total_set; 8049000b91eSNate Lawson if (CPUFREQ_CMP(fill_set->freq, itr_set->freq)) { 8059000b91eSNate Lawson CF_DEBUG("dup set rejecting %d (dupe)\n", 8069000b91eSNate Lawson fill_set->freq); 8079000b91eSNate Lawson itr = NULL; 8089000b91eSNate Lawson break; 8099000b91eSNate Lawson } else if (fill_set->freq < itr_set->freq) { 8109000b91eSNate Lawson if (fill->abs_set.freq <= itr->abs_set.freq) { 8118d913481SNate Lawson CF_DEBUG( 8128d913481SNate Lawson "dup done, inserting new level %d after %d\n", 8138d913481SNate Lawson fill_set->freq, itr_set->freq); 81488c9b54cSNate Lawson TAILQ_INSERT_AFTER(list, itr, fill, link); 81588c9b54cSNate Lawson sc->all_count++; 8169000b91eSNate Lawson } else { 8179000b91eSNate Lawson CF_DEBUG("dup set rejecting %d (abs too big)\n", 8189000b91eSNate Lawson fill_set->freq); 8199000b91eSNate Lawson itr = NULL; 8209000b91eSNate Lawson } 82188c9b54cSNate Lawson break; 82288c9b54cSNate Lawson } 82388c9b54cSNate Lawson } 8245308b2a6SNate Lawson 8255308b2a6SNate Lawson /* We didn't find a good place for this new level so free it. */ 8265308b2a6SNate Lawson if (itr == NULL) { 8275308b2a6SNate Lawson CF_DEBUG("dup set freeing new level %d (not optimal)\n", 8285308b2a6SNate Lawson fill_set->freq); 8295308b2a6SNate Lawson free(fill, M_TEMP); 8305308b2a6SNate Lawson fill = NULL; 83188c9b54cSNate Lawson } 83288c9b54cSNate Lawson 83388c9b54cSNate Lawson return (fill); 83488c9b54cSNate Lawson } 83588c9b54cSNate Lawson 83673347b07SNate Lawson static int 83773347b07SNate Lawson cpufreq_curr_sysctl(SYSCTL_HANDLER_ARGS) 83873347b07SNate Lawson { 83973347b07SNate Lawson struct cpufreq_softc *sc; 84073347b07SNate Lawson struct cf_level *levels; 8410325089dSNate Lawson int count, devcount, error, freq, i, n; 8420325089dSNate Lawson device_t *devs; 84373347b07SNate Lawson 8440325089dSNate Lawson devs = NULL; 84573347b07SNate Lawson sc = oidp->oid_arg1; 8460325089dSNate Lawson levels = malloc(CF_MAX_LEVELS * sizeof(*levels), M_TEMP, M_NOWAIT); 84773347b07SNate Lawson if (levels == NULL) 84873347b07SNate Lawson return (ENOMEM); 84973347b07SNate Lawson 85073347b07SNate Lawson error = CPUFREQ_GET(sc->dev, &levels[0]); 85173347b07SNate Lawson if (error) 85273347b07SNate Lawson goto out; 85373347b07SNate Lawson freq = levels[0].total_set.freq; 85473347b07SNate Lawson error = sysctl_handle_int(oidp, &freq, 0, req); 85573347b07SNate Lawson if (error != 0 || req->newptr == NULL) 85673347b07SNate Lawson goto out; 85773347b07SNate Lawson 8580325089dSNate Lawson /* 8590325089dSNate Lawson * While we only call cpufreq_get() on one device (assuming all 8600325089dSNate Lawson * CPUs have equal levels), we call cpufreq_set() on all CPUs. 8610325089dSNate Lawson * This is needed for some MP systems. 8620325089dSNate Lawson */ 8630325089dSNate Lawson error = devclass_get_devices(cpufreq_dc, &devs, &devcount); 86473347b07SNate Lawson if (error) 86573347b07SNate Lawson goto out; 8660325089dSNate Lawson for (n = 0; n < devcount; n++) { 8670325089dSNate Lawson count = CF_MAX_LEVELS; 8680325089dSNate Lawson error = CPUFREQ_LEVELS(devs[n], levels, &count); 869d269386aSNate Lawson if (error) { 870d269386aSNate Lawson if (error == E2BIG) 871d269386aSNate Lawson printf( 872d269386aSNate Lawson "cpufreq: need to increase CF_MAX_LEVELS\n"); 8730325089dSNate Lawson break; 874d269386aSNate Lawson } 87573347b07SNate Lawson for (i = 0; i < count; i++) { 87673347b07SNate Lawson if (CPUFREQ_CMP(levels[i].total_set.freq, freq)) { 8770325089dSNate Lawson error = CPUFREQ_SET(devs[n], &levels[i], 87873347b07SNate Lawson CPUFREQ_PRIO_USER); 87973347b07SNate Lawson break; 88073347b07SNate Lawson } 88173347b07SNate Lawson } 8820325089dSNate Lawson if (i == count) { 88373347b07SNate Lawson error = EINVAL; 8840325089dSNate Lawson break; 8850325089dSNate Lawson } 8860325089dSNate Lawson } 88773347b07SNate Lawson 88873347b07SNate Lawson out: 8890325089dSNate Lawson if (devs) 8900325089dSNate Lawson free(devs, M_TEMP); 89173347b07SNate Lawson if (levels) 89273347b07SNate Lawson free(levels, M_TEMP); 89373347b07SNate Lawson return (error); 89473347b07SNate Lawson } 89573347b07SNate Lawson 89673347b07SNate Lawson static int 89773347b07SNate Lawson cpufreq_levels_sysctl(SYSCTL_HANDLER_ARGS) 89873347b07SNate Lawson { 89973347b07SNate Lawson struct cpufreq_softc *sc; 90073347b07SNate Lawson struct cf_level *levels; 90173347b07SNate Lawson struct cf_setting *set; 90273347b07SNate Lawson struct sbuf sb; 90373347b07SNate Lawson int count, error, i; 90473347b07SNate Lawson 90573347b07SNate Lawson sc = oidp->oid_arg1; 90673347b07SNate Lawson sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND); 90773347b07SNate Lawson 90873347b07SNate Lawson /* Get settings from the device and generate the output string. */ 90973347b07SNate Lawson count = CF_MAX_LEVELS; 91073347b07SNate Lawson levels = malloc(count * sizeof(*levels), M_TEMP, M_NOWAIT); 91173347b07SNate Lawson if (levels == NULL) 91273347b07SNate Lawson return (ENOMEM); 91373347b07SNate Lawson error = CPUFREQ_LEVELS(sc->dev, levels, &count); 914d269386aSNate Lawson if (error) { 915d269386aSNate Lawson if (error == E2BIG) 916d269386aSNate Lawson printf("cpufreq: need to increase CF_MAX_LEVELS\n"); 91773347b07SNate Lawson goto out; 918d269386aSNate Lawson } 91973347b07SNate Lawson if (count) { 92073347b07SNate Lawson for (i = 0; i < count; i++) { 92173347b07SNate Lawson set = &levels[i].total_set; 92273347b07SNate Lawson sbuf_printf(&sb, "%d/%d ", set->freq, set->power); 92373347b07SNate Lawson } 92473347b07SNate Lawson } else 92573347b07SNate Lawson sbuf_cpy(&sb, "0"); 92673347b07SNate Lawson sbuf_trim(&sb); 92773347b07SNate Lawson sbuf_finish(&sb); 92873347b07SNate Lawson error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 92973347b07SNate Lawson 93073347b07SNate Lawson out: 93173347b07SNate Lawson free(levels, M_TEMP); 93273347b07SNate Lawson sbuf_delete(&sb); 93373347b07SNate Lawson return (error); 93473347b07SNate Lawson } 93573347b07SNate Lawson 936e959a70bSNate Lawson static int 937e959a70bSNate Lawson cpufreq_settings_sysctl(SYSCTL_HANDLER_ARGS) 938e959a70bSNate Lawson { 939e959a70bSNate Lawson device_t dev; 940e959a70bSNate Lawson struct cf_setting *sets; 941e959a70bSNate Lawson struct sbuf sb; 942e959a70bSNate Lawson int error, i, set_count; 943e959a70bSNate Lawson 944e959a70bSNate Lawson dev = oidp->oid_arg1; 945e959a70bSNate Lawson sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND); 946e959a70bSNate Lawson 947e959a70bSNate Lawson /* Get settings from the device and generate the output string. */ 948e959a70bSNate Lawson set_count = MAX_SETTINGS; 949e959a70bSNate Lawson sets = malloc(set_count * sizeof(*sets), M_TEMP, M_NOWAIT); 950e959a70bSNate Lawson if (sets == NULL) 951e959a70bSNate Lawson return (ENOMEM); 952e959a70bSNate Lawson error = CPUFREQ_DRV_SETTINGS(dev, sets, &set_count); 953e959a70bSNate Lawson if (error) 954e959a70bSNate Lawson goto out; 955e959a70bSNate Lawson if (set_count) { 956e959a70bSNate Lawson for (i = 0; i < set_count; i++) 957e959a70bSNate Lawson sbuf_printf(&sb, "%d/%d ", sets[i].freq, sets[i].power); 958e959a70bSNate Lawson } else 959e959a70bSNate Lawson sbuf_cpy(&sb, "0"); 960e959a70bSNate Lawson sbuf_trim(&sb); 961e959a70bSNate Lawson sbuf_finish(&sb); 962e959a70bSNate Lawson error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 963e959a70bSNate Lawson 964e959a70bSNate Lawson out: 965e959a70bSNate Lawson free(sets, M_TEMP); 966e959a70bSNate Lawson sbuf_delete(&sb); 967e959a70bSNate Lawson return (error); 968e959a70bSNate Lawson } 969e959a70bSNate Lawson 97073347b07SNate Lawson int 97173347b07SNate Lawson cpufreq_register(device_t dev) 97273347b07SNate Lawson { 97367c8649fSNate Lawson struct cpufreq_softc *sc; 97473347b07SNate Lawson device_t cf_dev, cpu_dev; 97573347b07SNate Lawson 976e959a70bSNate Lawson /* Add a sysctl to get each driver's settings separately. */ 977e959a70bSNate Lawson SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 978e959a70bSNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 979e959a70bSNate Lawson OID_AUTO, "freq_settings", CTLTYPE_STRING | CTLFLAG_RD, dev, 0, 980e959a70bSNate Lawson cpufreq_settings_sysctl, "A", "CPU frequency driver settings"); 981e959a70bSNate Lawson 98273347b07SNate Lawson /* 9830325089dSNate Lawson * Add only one cpufreq device to each CPU. Currently, all CPUs 9840325089dSNate Lawson * must offer the same levels and be switched at the same time. 98573347b07SNate Lawson */ 9860325089dSNate Lawson cpu_dev = device_get_parent(dev); 98767c8649fSNate Lawson if ((cf_dev = device_find_child(cpu_dev, "cpufreq", -1))) { 98867c8649fSNate Lawson sc = device_get_softc(cf_dev); 98967c8649fSNate Lawson sc->max_mhz = CPUFREQ_VAL_UNKNOWN; 99073347b07SNate Lawson return (0); 99167c8649fSNate Lawson } 99273347b07SNate Lawson 9930325089dSNate Lawson /* Add the child device and possibly sysctls. */ 9940325089dSNate Lawson cf_dev = BUS_ADD_CHILD(cpu_dev, 0, "cpufreq", -1); 99573347b07SNate Lawson if (cf_dev == NULL) 99673347b07SNate Lawson return (ENOMEM); 99773347b07SNate Lawson device_quiet(cf_dev); 99873347b07SNate Lawson 99973347b07SNate Lawson return (device_probe_and_attach(cf_dev)); 100073347b07SNate Lawson } 100173347b07SNate Lawson 100273347b07SNate Lawson int 100373347b07SNate Lawson cpufreq_unregister(device_t dev) 100473347b07SNate Lawson { 100573347b07SNate Lawson device_t cf_dev, *devs; 1006e94a0c1aSNate Lawson int cfcount, devcount, error, i, type; 100773347b07SNate Lawson 100873347b07SNate Lawson /* 100973347b07SNate Lawson * If this is the last cpufreq child device, remove the control 101073347b07SNate Lawson * device as well. We identify cpufreq children by calling a method 101173347b07SNate Lawson * they support. 101273347b07SNate Lawson */ 101373347b07SNate Lawson error = device_get_children(device_get_parent(dev), &devs, &devcount); 101473347b07SNate Lawson if (error) 101573347b07SNate Lawson return (error); 101667c8649fSNate Lawson cf_dev = device_find_child(device_get_parent(dev), "cpufreq", -1); 101771ab130cSNate Lawson if (cf_dev == NULL) { 101871ab130cSNate Lawson device_printf(dev, 101971ab130cSNate Lawson "warning: cpufreq_unregister called with no cpufreq device active\n"); 102071ab130cSNate Lawson return (0); 102171ab130cSNate Lawson } 102273347b07SNate Lawson cfcount = 0; 102373347b07SNate Lawson for (i = 0; i < devcount; i++) { 102473347b07SNate Lawson if (!device_is_attached(devs[i])) 102573347b07SNate Lawson continue; 1026e94a0c1aSNate Lawson if (CPUFREQ_DRV_TYPE(devs[i], &type) == 0) 102773347b07SNate Lawson cfcount++; 102873347b07SNate Lawson } 10290325089dSNate Lawson if (cfcount <= 1) 103073347b07SNate Lawson device_delete_child(device_get_parent(cf_dev), cf_dev); 103173347b07SNate Lawson free(devs, M_TEMP); 103273347b07SNate Lawson 103373347b07SNate Lawson return (0); 103473347b07SNate Lawson } 10350d4ac62aSNate Lawson 10360d4ac62aSNate Lawson int 10370d4ac62aSNate Lawson cpufreq_settings_changed(device_t dev) 10380d4ac62aSNate Lawson { 10390d4ac62aSNate Lawson 10400d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_levels_changed, 10410d4ac62aSNate Lawson device_get_unit(device_get_parent(dev))); 10420d4ac62aSNate Lawson return (0); 10430d4ac62aSNate Lawson } 1044