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> 4073347b07SNate Lawson #include <sys/sched.h> 4173347b07SNate Lawson #include <sys/sysctl.h> 4273347b07SNate Lawson #include <sys/systm.h> 4373347b07SNate Lawson #include <sys/sbuf.h> 44789f03ceSNate Lawson #include <sys/sx.h> 450325089dSNate Lawson #include <sys/timetc.h> 460d4ac62aSNate Lawson #include <sys/taskqueue.h> 4773347b07SNate Lawson 4873347b07SNate Lawson #include "cpufreq_if.h" 4973347b07SNate Lawson 5073347b07SNate Lawson /* 5173347b07SNate Lawson * Common CPU frequency glue code. Drivers for specific hardware can 5273347b07SNate Lawson * attach this interface to allow users to get/set the CPU frequency. 5373347b07SNate Lawson */ 5473347b07SNate Lawson 5573347b07SNate Lawson /* 5673347b07SNate Lawson * Number of levels we can handle. Levels are synthesized from settings 57d269386aSNate Lawson * so for M settings and N drivers, there may be M*N levels. 5873347b07SNate Lawson */ 59d269386aSNate Lawson #define CF_MAX_LEVELS 64 6073347b07SNate Lawson 6156e5a87aSHajimu UMEMOTO struct cf_saved_freq { 6256e5a87aSHajimu UMEMOTO struct cf_level level; 6356e5a87aSHajimu UMEMOTO int priority; 6456e5a87aSHajimu UMEMOTO SLIST_ENTRY(cf_saved_freq) link; 6556e5a87aSHajimu UMEMOTO }; 6656e5a87aSHajimu UMEMOTO 6773347b07SNate Lawson struct cpufreq_softc { 68789f03ceSNate Lawson struct sx lock; 6973347b07SNate Lawson struct cf_level curr_level; 705f0afa04SNate Lawson int curr_priority; 7156e5a87aSHajimu UMEMOTO SLIST_HEAD(, cf_saved_freq) saved_freq; 7273347b07SNate Lawson struct cf_level_lst all_levels; 735f0afa04SNate Lawson int all_count; 7467c8649fSNate Lawson int max_mhz; 7573347b07SNate Lawson device_t dev; 7673347b07SNate Lawson struct sysctl_ctx_list sysctl_ctx; 770d4ac62aSNate Lawson struct task startup_task; 7873347b07SNate Lawson }; 7973347b07SNate Lawson 8073347b07SNate Lawson struct cf_setting_array { 8173347b07SNate Lawson struct cf_setting sets[MAX_SETTINGS]; 8273347b07SNate Lawson int count; 8373347b07SNate Lawson TAILQ_ENTRY(cf_setting_array) link; 8473347b07SNate Lawson }; 8573347b07SNate Lawson 8673347b07SNate Lawson TAILQ_HEAD(cf_setting_lst, cf_setting_array); 8773347b07SNate Lawson 88789f03ceSNate Lawson #define CF_MTX_INIT(x) sx_init((x), "cpufreq lock") 89789f03ceSNate Lawson #define CF_MTX_LOCK(x) sx_xlock((x)) 90789f03ceSNate Lawson #define CF_MTX_UNLOCK(x) sx_xunlock((x)) 91789f03ceSNate Lawson #define CF_MTX_ASSERT(x) sx_assert((x), SX_XLOCKED) 92789f03ceSNate Lawson 938d913481SNate Lawson #define CF_DEBUG(msg...) do { \ 948d913481SNate Lawson if (cf_verbose) \ 958d913481SNate Lawson printf("cpufreq: " msg); \ 968d913481SNate Lawson } while (0) 978d913481SNate Lawson 9873347b07SNate Lawson static int cpufreq_attach(device_t dev); 990d4ac62aSNate Lawson static void cpufreq_startup_task(void *ctx, int pending); 10073347b07SNate Lawson static int cpufreq_detach(device_t dev); 10173347b07SNate Lawson static int cf_set_method(device_t dev, const struct cf_level *level, 10273347b07SNate Lawson int priority); 10373347b07SNate Lawson static int cf_get_method(device_t dev, struct cf_level *level); 10473347b07SNate Lawson static int cf_levels_method(device_t dev, struct cf_level *levels, 10573347b07SNate Lawson int *count); 10688c9b54cSNate Lawson static int cpufreq_insert_abs(struct cpufreq_softc *sc, 10773347b07SNate Lawson struct cf_setting *sets, int count); 10888c9b54cSNate Lawson static int cpufreq_expand_set(struct cpufreq_softc *sc, 10988c9b54cSNate Lawson struct cf_setting_array *set_arr); 11088c9b54cSNate Lawson static struct cf_level *cpufreq_dup_set(struct cpufreq_softc *sc, 11188c9b54cSNate Lawson struct cf_level *dup, struct cf_setting *set); 11273347b07SNate Lawson static int cpufreq_curr_sysctl(SYSCTL_HANDLER_ARGS); 11373347b07SNate Lawson static int cpufreq_levels_sysctl(SYSCTL_HANDLER_ARGS); 114e959a70bSNate Lawson static int cpufreq_settings_sysctl(SYSCTL_HANDLER_ARGS); 11573347b07SNate Lawson 11673347b07SNate Lawson static device_method_t cpufreq_methods[] = { 11773347b07SNate Lawson DEVMETHOD(device_probe, bus_generic_probe), 11873347b07SNate Lawson DEVMETHOD(device_attach, cpufreq_attach), 11973347b07SNate Lawson DEVMETHOD(device_detach, cpufreq_detach), 12073347b07SNate Lawson 12173347b07SNate Lawson DEVMETHOD(cpufreq_set, cf_set_method), 12273347b07SNate Lawson DEVMETHOD(cpufreq_get, cf_get_method), 12373347b07SNate Lawson DEVMETHOD(cpufreq_levels, cf_levels_method), 12473347b07SNate Lawson {0, 0} 12573347b07SNate Lawson }; 12673347b07SNate Lawson static driver_t cpufreq_driver = { 12773347b07SNate Lawson "cpufreq", cpufreq_methods, sizeof(struct cpufreq_softc) 12873347b07SNate Lawson }; 12973347b07SNate Lawson static devclass_t cpufreq_dc; 13073347b07SNate Lawson DRIVER_MODULE(cpufreq, cpu, cpufreq_driver, cpufreq_dc, 0, 0); 13173347b07SNate Lawson 132b070969bSNate Lawson static int cf_lowest_freq; 1338d913481SNate Lawson static int cf_verbose; 134b070969bSNate Lawson TUNABLE_INT("debug.cpufreq.lowest", &cf_lowest_freq); 1358d913481SNate Lawson TUNABLE_INT("debug.cpufreq.verbose", &cf_verbose); 136b070969bSNate Lawson SYSCTL_NODE(_debug, OID_AUTO, cpufreq, CTLFLAG_RD, NULL, "cpufreq debugging"); 137b070969bSNate Lawson SYSCTL_INT(_debug_cpufreq, OID_AUTO, lowest, CTLFLAG_RW, &cf_lowest_freq, 1, 138b070969bSNate Lawson "Don't provide levels below this frequency."); 1398d913481SNate Lawson SYSCTL_INT(_debug_cpufreq, OID_AUTO, verbose, CTLFLAG_RW, &cf_verbose, 1, 1408d913481SNate Lawson "Print verbose debugging messages"); 141b070969bSNate Lawson 14273347b07SNate Lawson static int 14373347b07SNate Lawson cpufreq_attach(device_t dev) 14473347b07SNate Lawson { 14573347b07SNate Lawson struct cpufreq_softc *sc; 14673347b07SNate Lawson device_t parent; 14773347b07SNate Lawson int numdevs; 14873347b07SNate Lawson 1498d913481SNate Lawson CF_DEBUG("initializing %s\n", device_get_nameunit(dev)); 15073347b07SNate Lawson sc = device_get_softc(dev); 15173347b07SNate Lawson parent = device_get_parent(dev); 15273347b07SNate Lawson sc->dev = dev; 15373347b07SNate Lawson sysctl_ctx_init(&sc->sysctl_ctx); 15473347b07SNate Lawson TAILQ_INIT(&sc->all_levels); 155789f03ceSNate Lawson CF_MTX_INIT(&sc->lock); 15673347b07SNate Lawson sc->curr_level.total_set.freq = CPUFREQ_VAL_UNKNOWN; 15756e5a87aSHajimu UMEMOTO SLIST_INIT(&sc->saved_freq); 15867c8649fSNate Lawson sc->max_mhz = CPUFREQ_VAL_UNKNOWN; 15973347b07SNate Lawson 16073347b07SNate Lawson /* 16173347b07SNate Lawson * Only initialize one set of sysctls for all CPUs. In the future, 16273347b07SNate Lawson * if multiple CPUs can have different settings, we can move these 16373347b07SNate Lawson * sysctls to be under every CPU instead of just the first one. 16473347b07SNate Lawson */ 16573347b07SNate Lawson numdevs = devclass_get_count(cpufreq_dc); 16673347b07SNate Lawson if (numdevs > 1) 16773347b07SNate Lawson return (0); 16873347b07SNate Lawson 1698d913481SNate Lawson CF_DEBUG("initializing one-time data for %s\n", 1708d913481SNate Lawson device_get_nameunit(dev)); 17173347b07SNate Lawson SYSCTL_ADD_PROC(&sc->sysctl_ctx, 17273347b07SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(parent)), 17373347b07SNate Lawson OID_AUTO, "freq", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 17473347b07SNate Lawson cpufreq_curr_sysctl, "I", "Current CPU frequency"); 17573347b07SNate Lawson SYSCTL_ADD_PROC(&sc->sysctl_ctx, 17673347b07SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(parent)), 17773347b07SNate Lawson OID_AUTO, "freq_levels", CTLTYPE_STRING | CTLFLAG_RD, sc, 0, 17873347b07SNate Lawson cpufreq_levels_sysctl, "A", "CPU frequency levels"); 1790d4ac62aSNate Lawson 1800d4ac62aSNate Lawson /* 1810d4ac62aSNate Lawson * Queue a one-shot broadcast that levels have changed. 1820d4ac62aSNate Lawson * It will run once the system has completed booting. 1830d4ac62aSNate Lawson */ 1840d4ac62aSNate Lawson TASK_INIT(&sc->startup_task, 0, cpufreq_startup_task, dev); 1850d4ac62aSNate Lawson taskqueue_enqueue(taskqueue_thread, &sc->startup_task); 18673347b07SNate Lawson 18773347b07SNate Lawson return (0); 18873347b07SNate Lawson } 18973347b07SNate Lawson 1900d4ac62aSNate Lawson /* Handle any work to be done for all drivers that attached during boot. */ 1910d4ac62aSNate Lawson static void 1920d4ac62aSNate Lawson cpufreq_startup_task(void *ctx, int pending) 1930d4ac62aSNate Lawson { 1940d4ac62aSNate Lawson 1950d4ac62aSNate Lawson cpufreq_settings_changed((device_t)ctx); 1960d4ac62aSNate Lawson } 1970d4ac62aSNate Lawson 19873347b07SNate Lawson static int 19973347b07SNate Lawson cpufreq_detach(device_t dev) 20073347b07SNate Lawson { 20173347b07SNate Lawson struct cpufreq_softc *sc; 20256e5a87aSHajimu UMEMOTO struct cf_saved_freq *saved_freq; 20373347b07SNate Lawson int numdevs; 20473347b07SNate Lawson 2058d913481SNate Lawson CF_DEBUG("shutdown %s\n", device_get_nameunit(dev)); 20673347b07SNate Lawson sc = device_get_softc(dev); 20773347b07SNate Lawson sysctl_ctx_free(&sc->sysctl_ctx); 20873347b07SNate Lawson 20956e5a87aSHajimu UMEMOTO while ((saved_freq = SLIST_FIRST(&sc->saved_freq)) != NULL) { 21056e5a87aSHajimu UMEMOTO SLIST_REMOVE_HEAD(&sc->saved_freq, link); 21156e5a87aSHajimu UMEMOTO free(saved_freq, M_TEMP); 21256e5a87aSHajimu UMEMOTO } 21356e5a87aSHajimu UMEMOTO 21473347b07SNate Lawson /* Only clean up these resources when the last device is detaching. */ 21573347b07SNate Lawson numdevs = devclass_get_count(cpufreq_dc); 2168d913481SNate Lawson if (numdevs == 1) { 2178d913481SNate Lawson CF_DEBUG("final shutdown for %s\n", device_get_nameunit(dev)); 2188d913481SNate Lawson } 21973347b07SNate Lawson 22073347b07SNate Lawson return (0); 22173347b07SNate Lawson } 22273347b07SNate Lawson 22373347b07SNate Lawson static int 22473347b07SNate Lawson cf_set_method(device_t dev, const struct cf_level *level, int priority) 22573347b07SNate Lawson { 22673347b07SNate Lawson struct cpufreq_softc *sc; 22773347b07SNate Lawson const struct cf_setting *set; 22856e5a87aSHajimu UMEMOTO struct cf_saved_freq *saved_freq, *curr_freq; 2290325089dSNate Lawson struct pcpu *pc; 23062db376aSNate Lawson int error, i; 23173347b07SNate Lawson 23273347b07SNate Lawson sc = device_get_softc(dev); 233789f03ceSNate Lawson error = 0; 234789f03ceSNate Lawson set = NULL; 23556e5a87aSHajimu UMEMOTO saved_freq = NULL; 23673347b07SNate Lawson 2370d4ac62aSNate Lawson /* We are going to change levels so notify the pre-change handler. */ 2380d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_pre_change, level, &error); 2390d4ac62aSNate Lawson if (error != 0) { 2400d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_post_change, level, error); 2410d4ac62aSNate Lawson return (error); 242b4130b8aSMarcus Alves Grando } 2430325089dSNate Lawson 244789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 24556e5a87aSHajimu UMEMOTO 24656e5a87aSHajimu UMEMOTO /* 24756e5a87aSHajimu UMEMOTO * If the requested level has a lower priority, don't allow 24856e5a87aSHajimu UMEMOTO * the new level right now. 24956e5a87aSHajimu UMEMOTO */ 25056e5a87aSHajimu UMEMOTO if (priority < sc->curr_priority) { 2518d913481SNate Lawson CF_DEBUG("ignoring, curr prio %d less than %d\n", priority, 2528d913481SNate Lawson sc->curr_priority); 253789f03ceSNate Lawson error = EPERM; 254789f03ceSNate Lawson goto out; 255789f03ceSNate Lawson } 2565f0afa04SNate Lawson 25756e5a87aSHajimu UMEMOTO /* 25856e5a87aSHajimu UMEMOTO * If the caller didn't specify a level and one is saved, prepare to 25956e5a87aSHajimu UMEMOTO * restore the saved level. If none has been saved, return an error. 26056e5a87aSHajimu UMEMOTO */ 26156e5a87aSHajimu UMEMOTO if (level == NULL) { 26256e5a87aSHajimu UMEMOTO saved_freq = SLIST_FIRST(&sc->saved_freq); 26356e5a87aSHajimu UMEMOTO if (saved_freq == NULL) { 26456e5a87aSHajimu UMEMOTO CF_DEBUG("NULL level, no saved level\n"); 26556e5a87aSHajimu UMEMOTO error = ENXIO; 26656e5a87aSHajimu UMEMOTO goto out; 26756e5a87aSHajimu UMEMOTO } 26856e5a87aSHajimu UMEMOTO level = &saved_freq->level; 26956e5a87aSHajimu UMEMOTO priority = saved_freq->priority; 27056e5a87aSHajimu UMEMOTO CF_DEBUG("restoring saved level, freq %d prio %d\n", 27156e5a87aSHajimu UMEMOTO level->total_set.freq, priority); 27256e5a87aSHajimu UMEMOTO } 27356e5a87aSHajimu UMEMOTO 274b070969bSNate Lawson /* Reject levels that are below our specified threshold. */ 275da8a77c1SNate Lawson if (level->total_set.freq < cf_lowest_freq) { 2768d913481SNate Lawson CF_DEBUG("rejecting freq %d, less than %d limit\n", 2778d913481SNate Lawson level->total_set.freq, cf_lowest_freq); 278789f03ceSNate Lawson error = EINVAL; 279789f03ceSNate Lawson goto out; 280789f03ceSNate Lawson } 281b070969bSNate Lawson 28273347b07SNate Lawson /* If already at this level, just return. */ 2838d913481SNate Lawson if (CPUFREQ_CMP(sc->curr_level.total_set.freq, level->total_set.freq)) { 2848d913481SNate Lawson CF_DEBUG("skipping freq %d, same as current level %d\n", 2858d913481SNate Lawson level->total_set.freq, sc->curr_level.total_set.freq); 2861fea6ce7SHajimu UMEMOTO goto skip; 2878d913481SNate Lawson } 28873347b07SNate Lawson 28973347b07SNate Lawson /* First, set the absolute frequency via its driver. */ 29073347b07SNate Lawson set = &level->abs_set; 29173347b07SNate Lawson if (set->dev) { 29273347b07SNate Lawson if (!device_is_attached(set->dev)) { 29373347b07SNate Lawson error = ENXIO; 29473347b07SNate Lawson goto out; 29573347b07SNate Lawson } 2961196826aSNate Lawson 29762db376aSNate Lawson /* Bind to the target CPU before switching. */ 2981196826aSNate Lawson pc = cpu_get_pcpu(set->dev); 299982d11f8SJeff Roberson thread_lock(curthread); 3001196826aSNate Lawson sched_bind(curthread, pc->pc_cpuid); 301982d11f8SJeff Roberson thread_unlock(curthread); 3028d913481SNate Lawson CF_DEBUG("setting abs freq %d on %s (cpu %d)\n", set->freq, 3038d913481SNate Lawson device_get_nameunit(set->dev), PCPU_GET(cpuid)); 30473347b07SNate Lawson error = CPUFREQ_DRV_SET(set->dev, set); 305982d11f8SJeff Roberson thread_lock(curthread); 3061196826aSNate Lawson sched_unbind(curthread); 307982d11f8SJeff Roberson thread_unlock(curthread); 30873347b07SNate Lawson if (error) { 30973347b07SNate Lawson goto out; 31073347b07SNate Lawson } 31173347b07SNate Lawson } 31273347b07SNate Lawson 31388c9b54cSNate Lawson /* Next, set any/all relative frequencies via their drivers. */ 31488c9b54cSNate Lawson for (i = 0; i < level->rel_count; i++) { 31588c9b54cSNate Lawson set = &level->rel_set[i]; 31688c9b54cSNate Lawson if (!device_is_attached(set->dev)) { 31788c9b54cSNate Lawson error = ENXIO; 31888c9b54cSNate Lawson goto out; 31988c9b54cSNate Lawson } 3201196826aSNate Lawson 32162db376aSNate Lawson /* Bind to the target CPU before switching. */ 3221196826aSNate Lawson pc = cpu_get_pcpu(set->dev); 323982d11f8SJeff Roberson thread_lock(curthread); 3241196826aSNate Lawson sched_bind(curthread, pc->pc_cpuid); 325982d11f8SJeff Roberson thread_unlock(curthread); 3268d913481SNate Lawson CF_DEBUG("setting rel freq %d on %s (cpu %d)\n", set->freq, 3278d913481SNate Lawson device_get_nameunit(set->dev), PCPU_GET(cpuid)); 32888c9b54cSNate Lawson error = CPUFREQ_DRV_SET(set->dev, set); 329982d11f8SJeff Roberson thread_lock(curthread); 3301196826aSNate Lawson sched_unbind(curthread); 331982d11f8SJeff Roberson thread_unlock(curthread); 33288c9b54cSNate Lawson if (error) { 33388c9b54cSNate Lawson /* XXX Back out any successful setting? */ 33488c9b54cSNate Lawson goto out; 33588c9b54cSNate Lawson } 33688c9b54cSNate Lawson } 33773347b07SNate Lawson 3381fea6ce7SHajimu UMEMOTO skip: 3395f0afa04SNate Lawson /* 3405f0afa04SNate Lawson * Before recording the current level, check if we're going to a 34156e5a87aSHajimu UMEMOTO * higher priority. If so, save the previous level and priority. 3425f0afa04SNate Lawson */ 3435f0afa04SNate Lawson if (sc->curr_level.total_set.freq != CPUFREQ_VAL_UNKNOWN && 34456e5a87aSHajimu UMEMOTO priority > sc->curr_priority) { 3458d913481SNate Lawson CF_DEBUG("saving level, freq %d prio %d\n", 3468d913481SNate Lawson sc->curr_level.total_set.freq, sc->curr_priority); 34756e5a87aSHajimu UMEMOTO curr_freq = malloc(sizeof(*curr_freq), M_TEMP, M_NOWAIT); 34856e5a87aSHajimu UMEMOTO if (curr_freq == NULL) { 34956e5a87aSHajimu UMEMOTO error = ENOMEM; 35056e5a87aSHajimu UMEMOTO goto out; 35156e5a87aSHajimu UMEMOTO } 35256e5a87aSHajimu UMEMOTO curr_freq->level = sc->curr_level; 35356e5a87aSHajimu UMEMOTO curr_freq->priority = sc->curr_priority; 35456e5a87aSHajimu UMEMOTO SLIST_INSERT_HEAD(&sc->saved_freq, curr_freq, link); 3555f0afa04SNate Lawson } 35673347b07SNate Lawson sc->curr_level = *level; 3575f0afa04SNate Lawson sc->curr_priority = priority; 35873347b07SNate Lawson 35956e5a87aSHajimu UMEMOTO /* If we were restoring a saved state, reset it to "unused". */ 36056e5a87aSHajimu UMEMOTO if (saved_freq != NULL) { 36156e5a87aSHajimu UMEMOTO CF_DEBUG("resetting saved level\n"); 36256e5a87aSHajimu UMEMOTO sc->curr_level.total_set.freq = CPUFREQ_VAL_UNKNOWN; 36356e5a87aSHajimu UMEMOTO SLIST_REMOVE_HEAD(&sc->saved_freq, link); 36456e5a87aSHajimu UMEMOTO free(saved_freq, M_TEMP); 36556e5a87aSHajimu UMEMOTO } 36656e5a87aSHajimu UMEMOTO 36773347b07SNate Lawson out: 368789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 3690d4ac62aSNate Lawson 3700d4ac62aSNate Lawson /* 3710d4ac62aSNate Lawson * We changed levels (or attempted to) so notify the post-change 3720d4ac62aSNate Lawson * handler of new frequency or error. 3730d4ac62aSNate Lawson */ 3740d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_post_change, level, error); 375789f03ceSNate Lawson if (error && set) 37673347b07SNate Lawson device_printf(set->dev, "set freq failed, err %d\n", error); 3770d4ac62aSNate Lawson 37873347b07SNate Lawson return (error); 37973347b07SNate Lawson } 38073347b07SNate Lawson 38173347b07SNate Lawson static int 38273347b07SNate Lawson cf_get_method(device_t dev, struct cf_level *level) 38373347b07SNate Lawson { 38473347b07SNate Lawson struct cpufreq_softc *sc; 38573347b07SNate Lawson struct cf_level *levels; 38673347b07SNate Lawson struct cf_setting *curr_set, set; 38773347b07SNate Lawson struct pcpu *pc; 38873347b07SNate Lawson device_t *devs; 3892145b9d2SNate Lawson int count, error, i, n, numdevs; 39073347b07SNate Lawson uint64_t rate; 39173347b07SNate Lawson 39273347b07SNate Lawson sc = device_get_softc(dev); 393789f03ceSNate Lawson error = 0; 39473347b07SNate Lawson levels = NULL; 39573347b07SNate Lawson 39673347b07SNate Lawson /* If we already know the current frequency, we're done. */ 397789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 398789f03ceSNate Lawson curr_set = &sc->curr_level.total_set; 3998d913481SNate Lawson if (curr_set->freq != CPUFREQ_VAL_UNKNOWN) { 4008d913481SNate Lawson CF_DEBUG("get returning known freq %d\n", curr_set->freq); 40173347b07SNate Lawson goto out; 4028d913481SNate Lawson } 403789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 40473347b07SNate Lawson 40573347b07SNate Lawson /* 40673347b07SNate Lawson * We need to figure out the current level. Loop through every 40773347b07SNate Lawson * driver, getting the current setting. Then, attempt to get a best 40873347b07SNate Lawson * match of settings against each level. 40973347b07SNate Lawson */ 41073347b07SNate Lawson count = CF_MAX_LEVELS; 41173347b07SNate Lawson levels = malloc(count * sizeof(*levels), M_TEMP, M_NOWAIT); 41273347b07SNate Lawson if (levels == NULL) 41373347b07SNate Lawson return (ENOMEM); 41473347b07SNate Lawson error = CPUFREQ_LEVELS(sc->dev, levels, &count); 415d269386aSNate Lawson if (error) { 416d269386aSNate Lawson if (error == E2BIG) 417d269386aSNate Lawson printf("cpufreq: need to increase CF_MAX_LEVELS\n"); 418789f03ceSNate Lawson free(levels, M_TEMP); 419789f03ceSNate Lawson return (error); 420d269386aSNate Lawson } 42173347b07SNate Lawson error = device_get_children(device_get_parent(dev), &devs, &numdevs); 422789f03ceSNate Lawson if (error) { 423789f03ceSNate Lawson free(levels, M_TEMP); 424789f03ceSNate Lawson return (error); 425789f03ceSNate Lawson } 426789f03ceSNate Lawson 427789f03ceSNate Lawson /* 428789f03ceSNate Lawson * Reacquire the lock and search for the given level. 429789f03ceSNate Lawson * 430789f03ceSNate Lawson * XXX Note: this is not quite right since we really need to go 431789f03ceSNate Lawson * through each level and compare both absolute and relative 432789f03ceSNate Lawson * settings for each driver in the system before making a match. 433789f03ceSNate Lawson * The estimation code below catches this case though. 434789f03ceSNate Lawson */ 435789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 4362145b9d2SNate Lawson for (n = 0; n < numdevs && curr_set->freq == CPUFREQ_VAL_UNKNOWN; n++) { 4372145b9d2SNate Lawson if (!device_is_attached(devs[n])) 43873347b07SNate Lawson continue; 4392145b9d2SNate Lawson error = CPUFREQ_DRV_GET(devs[n], &set); 44073347b07SNate Lawson if (error) 44173347b07SNate Lawson continue; 44273347b07SNate Lawson for (i = 0; i < count; i++) { 44388c9b54cSNate Lawson if (CPUFREQ_CMP(set.freq, levels[i].total_set.freq)) { 44473347b07SNate Lawson sc->curr_level = levels[i]; 44573347b07SNate Lawson break; 44673347b07SNate Lawson } 44773347b07SNate Lawson } 44873347b07SNate Lawson } 44973347b07SNate Lawson free(devs, M_TEMP); 4508d913481SNate Lawson if (curr_set->freq != CPUFREQ_VAL_UNKNOWN) { 4518d913481SNate Lawson CF_DEBUG("get matched freq %d from drivers\n", curr_set->freq); 45273347b07SNate Lawson goto out; 4538d913481SNate Lawson } 45473347b07SNate Lawson 45573347b07SNate Lawson /* 45673347b07SNate Lawson * We couldn't find an exact match, so attempt to estimate and then 45773347b07SNate Lawson * match against a level. 45873347b07SNate Lawson */ 45973347b07SNate Lawson pc = cpu_get_pcpu(dev); 46073347b07SNate Lawson if (pc == NULL) { 46173347b07SNate Lawson error = ENXIO; 46273347b07SNate Lawson goto out; 46373347b07SNate Lawson } 46473347b07SNate Lawson cpu_est_clockrate(pc->pc_cpuid, &rate); 46573347b07SNate Lawson rate /= 1000000; 46673347b07SNate Lawson for (i = 0; i < count; i++) { 46773347b07SNate Lawson if (CPUFREQ_CMP(rate, levels[i].total_set.freq)) { 46873347b07SNate Lawson sc->curr_level = levels[i]; 4698d913481SNate Lawson CF_DEBUG("get estimated freq %d\n", curr_set->freq); 47073347b07SNate Lawson break; 47173347b07SNate Lawson } 47273347b07SNate Lawson } 47373347b07SNate Lawson 47473347b07SNate Lawson out: 475789f03ceSNate Lawson if (error == 0) 476789f03ceSNate Lawson *level = sc->curr_level; 477789f03ceSNate Lawson 478789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 47973347b07SNate Lawson if (levels) 48073347b07SNate Lawson free(levels, M_TEMP); 481789f03ceSNate Lawson return (error); 48273347b07SNate Lawson } 48373347b07SNate Lawson 48473347b07SNate Lawson static int 48573347b07SNate Lawson cf_levels_method(device_t dev, struct cf_level *levels, int *count) 48673347b07SNate Lawson { 48788c9b54cSNate Lawson struct cf_setting_array *set_arr; 48873347b07SNate Lawson struct cf_setting_lst rel_sets; 48973347b07SNate Lawson struct cpufreq_softc *sc; 49073347b07SNate Lawson struct cf_level *lev; 49173347b07SNate Lawson struct cf_setting *sets; 49273347b07SNate Lawson struct pcpu *pc; 49373347b07SNate Lawson device_t *devs; 49488c9b54cSNate Lawson int error, i, numdevs, set_count, type; 49573347b07SNate Lawson uint64_t rate; 49673347b07SNate Lawson 49773347b07SNate Lawson if (levels == NULL || count == NULL) 49873347b07SNate Lawson return (EINVAL); 49973347b07SNate Lawson 50073347b07SNate Lawson TAILQ_INIT(&rel_sets); 50173347b07SNate Lawson sc = device_get_softc(dev); 50273347b07SNate Lawson error = device_get_children(device_get_parent(dev), &devs, &numdevs); 50373347b07SNate Lawson if (error) 50473347b07SNate Lawson return (error); 50573347b07SNate Lawson sets = malloc(MAX_SETTINGS * sizeof(*sets), M_TEMP, M_NOWAIT); 50673347b07SNate Lawson if (sets == NULL) { 50773347b07SNate Lawson free(devs, M_TEMP); 50873347b07SNate Lawson return (ENOMEM); 50973347b07SNate Lawson } 51073347b07SNate Lawson 51173347b07SNate Lawson /* Get settings from all cpufreq drivers. */ 512789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 51373347b07SNate Lawson for (i = 0; i < numdevs; i++) { 514e22cd41cSNate Lawson /* Skip devices that aren't ready. */ 51573347b07SNate Lawson if (!device_is_attached(devs[i])) 51673347b07SNate Lawson continue; 517e22cd41cSNate Lawson 518e22cd41cSNate Lawson /* 519e22cd41cSNate Lawson * Get settings, skipping drivers that offer no settings or 520e22cd41cSNate Lawson * provide settings for informational purposes only. 521e22cd41cSNate Lawson */ 522e94a0c1aSNate Lawson error = CPUFREQ_DRV_TYPE(devs[i], &type); 5238d913481SNate Lawson if (error || (type & CPUFREQ_FLAG_INFO_ONLY)) { 5248d913481SNate Lawson if (error == 0) { 5258d913481SNate Lawson CF_DEBUG("skipping info-only driver %s\n", 5268d913481SNate Lawson device_get_nameunit(devs[i])); 5278d913481SNate Lawson } 528e94a0c1aSNate Lawson continue; 5298d913481SNate Lawson } 53073347b07SNate Lawson set_count = MAX_SETTINGS; 531e94a0c1aSNate Lawson error = CPUFREQ_DRV_SETTINGS(devs[i], sets, &set_count); 532e94a0c1aSNate Lawson if (error || set_count == 0) 53373347b07SNate Lawson continue; 53473347b07SNate Lawson 535e22cd41cSNate Lawson /* Add the settings to our absolute/relative lists. */ 5360325089dSNate Lawson switch (type & CPUFREQ_TYPE_MASK) { 53788c9b54cSNate Lawson case CPUFREQ_TYPE_ABSOLUTE: 53888c9b54cSNate Lawson error = cpufreq_insert_abs(sc, sets, set_count); 53988c9b54cSNate Lawson break; 54088c9b54cSNate Lawson case CPUFREQ_TYPE_RELATIVE: 5418d913481SNate Lawson CF_DEBUG("adding %d relative settings\n", set_count); 54288c9b54cSNate Lawson set_arr = malloc(sizeof(*set_arr), M_TEMP, M_NOWAIT); 54388c9b54cSNate Lawson if (set_arr == NULL) { 54488c9b54cSNate Lawson error = ENOMEM; 54588c9b54cSNate Lawson goto out; 54688c9b54cSNate Lawson } 54788c9b54cSNate Lawson bcopy(sets, set_arr->sets, set_count * sizeof(*sets)); 54888c9b54cSNate Lawson set_arr->count = set_count; 54988c9b54cSNate Lawson TAILQ_INSERT_TAIL(&rel_sets, set_arr, link); 55088c9b54cSNate Lawson break; 55188c9b54cSNate Lawson default: 55288c9b54cSNate Lawson error = EINVAL; 55388c9b54cSNate Lawson } 55488c9b54cSNate Lawson if (error) 55573347b07SNate Lawson goto out; 55673347b07SNate Lawson } 55773347b07SNate Lawson 55867c8649fSNate Lawson /* 55967c8649fSNate Lawson * If there are no absolute levels, create a fake one at 100%. We 56067c8649fSNate Lawson * then cache the clockrate for later use as our base frequency. 56167c8649fSNate Lawson * 56267c8649fSNate Lawson * XXX This assumes that the first time through, if we only have 56367c8649fSNate Lawson * relative drivers, the CPU is currently running at 100%. 56467c8649fSNate Lawson */ 56573347b07SNate Lawson if (TAILQ_EMPTY(&sc->all_levels)) { 56667c8649fSNate Lawson if (sc->max_mhz == CPUFREQ_VAL_UNKNOWN) { 56773347b07SNate Lawson pc = cpu_get_pcpu(dev); 56873347b07SNate Lawson cpu_est_clockrate(pc->pc_cpuid, &rate); 56967c8649fSNate Lawson sc->max_mhz = rate / 1000000; 57067c8649fSNate Lawson } 57167c8649fSNate Lawson memset(&sets[0], CPUFREQ_VAL_UNKNOWN, sizeof(*sets)); 57267c8649fSNate Lawson sets[0].freq = sc->max_mhz; 57367c8649fSNate Lawson sets[0].dev = NULL; 57488c9b54cSNate Lawson error = cpufreq_insert_abs(sc, sets, 1); 57573347b07SNate Lawson if (error) 57673347b07SNate Lawson goto out; 57773347b07SNate Lawson } 57873347b07SNate Lawson 57988c9b54cSNate Lawson /* Create a combined list of absolute + relative levels. */ 58088c9b54cSNate Lawson TAILQ_FOREACH(set_arr, &rel_sets, link) 58188c9b54cSNate Lawson cpufreq_expand_set(sc, set_arr); 58288c9b54cSNate Lawson 58388c9b54cSNate Lawson /* If the caller doesn't have enough space, return the actual count. */ 58488c9b54cSNate Lawson if (sc->all_count > *count) { 58588c9b54cSNate Lawson *count = sc->all_count; 58688c9b54cSNate Lawson error = E2BIG; 58788c9b54cSNate Lawson goto out; 58888c9b54cSNate Lawson } 58988c9b54cSNate Lawson 59088c9b54cSNate Lawson /* Finally, output the list of levels. */ 59173347b07SNate Lawson i = 0; 59273347b07SNate Lawson TAILQ_FOREACH(lev, &sc->all_levels, link) { 593b070969bSNate Lawson /* Skip levels that have a frequency that is too low. */ 594da8a77c1SNate Lawson if (lev->total_set.freq < cf_lowest_freq) { 595b070969bSNate Lawson sc->all_count--; 596b070969bSNate Lawson continue; 597b070969bSNate Lawson } 598b070969bSNate Lawson 59973347b07SNate Lawson levels[i] = *lev; 60073347b07SNate Lawson i++; 60173347b07SNate Lawson } 60288c9b54cSNate Lawson *count = sc->all_count; 60373347b07SNate Lawson error = 0; 60473347b07SNate Lawson 60573347b07SNate Lawson out: 60673347b07SNate Lawson /* Clear all levels since we regenerate them each time. */ 60773347b07SNate Lawson while ((lev = TAILQ_FIRST(&sc->all_levels)) != NULL) { 60873347b07SNate Lawson TAILQ_REMOVE(&sc->all_levels, lev, link); 60973347b07SNate Lawson free(lev, M_TEMP); 61073347b07SNate Lawson } 611789f03ceSNate Lawson sc->all_count = 0; 612789f03ceSNate Lawson 613789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 61488c9b54cSNate Lawson while ((set_arr = TAILQ_FIRST(&rel_sets)) != NULL) { 61588c9b54cSNate Lawson TAILQ_REMOVE(&rel_sets, set_arr, link); 61688c9b54cSNate Lawson free(set_arr, M_TEMP); 61788c9b54cSNate Lawson } 61873347b07SNate Lawson free(devs, M_TEMP); 61973347b07SNate Lawson free(sets, M_TEMP); 62073347b07SNate Lawson return (error); 62173347b07SNate Lawson } 62273347b07SNate Lawson 62373347b07SNate Lawson /* 62473347b07SNate Lawson * Create levels for an array of absolute settings and insert them in 62573347b07SNate Lawson * sorted order in the specified list. 62673347b07SNate Lawson */ 62773347b07SNate Lawson static int 62888c9b54cSNate Lawson cpufreq_insert_abs(struct cpufreq_softc *sc, struct cf_setting *sets, 62973347b07SNate Lawson int count) 63073347b07SNate Lawson { 63188c9b54cSNate Lawson struct cf_level_lst *list; 63273347b07SNate Lawson struct cf_level *level, *search; 63373347b07SNate Lawson int i; 63473347b07SNate Lawson 635789f03ceSNate Lawson CF_MTX_ASSERT(&sc->lock); 636789f03ceSNate Lawson 63788c9b54cSNate Lawson list = &sc->all_levels; 63873347b07SNate Lawson for (i = 0; i < count; i++) { 63973347b07SNate Lawson level = malloc(sizeof(*level), M_TEMP, M_NOWAIT | M_ZERO); 64073347b07SNate Lawson if (level == NULL) 64173347b07SNate Lawson return (ENOMEM); 64273347b07SNate Lawson level->abs_set = sets[i]; 64388c9b54cSNate Lawson level->total_set = sets[i]; 64488c9b54cSNate Lawson level->total_set.dev = NULL; 64588c9b54cSNate Lawson sc->all_count++; 64673347b07SNate Lawson 64773347b07SNate Lawson if (TAILQ_EMPTY(list)) { 6488d913481SNate Lawson CF_DEBUG("adding abs setting %d at head\n", 6498d913481SNate Lawson sets[i].freq); 65073347b07SNate Lawson TAILQ_INSERT_HEAD(list, level, link); 65173347b07SNate Lawson continue; 65273347b07SNate Lawson } 65373347b07SNate Lawson 65473347b07SNate Lawson TAILQ_FOREACH_REVERSE(search, list, cf_level_lst, link) { 65588c9b54cSNate Lawson if (sets[i].freq <= search->total_set.freq) { 6568d913481SNate Lawson CF_DEBUG("adding abs setting %d after %d\n", 6578d913481SNate Lawson sets[i].freq, search->total_set.freq); 65873347b07SNate Lawson TAILQ_INSERT_AFTER(list, search, level, link); 65973347b07SNate Lawson break; 66073347b07SNate Lawson } 66173347b07SNate Lawson } 66273347b07SNate Lawson } 66373347b07SNate Lawson return (0); 66473347b07SNate Lawson } 66573347b07SNate Lawson 66688c9b54cSNate Lawson /* 66788c9b54cSNate Lawson * Expand a group of relative settings, creating derived levels from them. 66888c9b54cSNate Lawson */ 66988c9b54cSNate Lawson static int 67088c9b54cSNate Lawson cpufreq_expand_set(struct cpufreq_softc *sc, struct cf_setting_array *set_arr) 67188c9b54cSNate Lawson { 67288c9b54cSNate Lawson struct cf_level *fill, *search; 67388c9b54cSNate Lawson struct cf_setting *set; 67488c9b54cSNate Lawson int i; 67588c9b54cSNate Lawson 676789f03ceSNate Lawson CF_MTX_ASSERT(&sc->lock); 677789f03ceSNate Lawson 6785308b2a6SNate Lawson /* 6795308b2a6SNate Lawson * Walk the set of all existing levels in reverse. This is so we 6805308b2a6SNate Lawson * create derived states from the lowest absolute settings first 6815308b2a6SNate Lawson * and discard duplicates created from higher absolute settings. 6825308b2a6SNate Lawson * For instance, a level of 50 Mhz derived from 100 Mhz + 50% is 6835308b2a6SNate Lawson * preferable to 200 Mhz + 25% because absolute settings are more 6845308b2a6SNate Lawson * efficient since they often change the voltage as well. 6855308b2a6SNate Lawson */ 6865308b2a6SNate Lawson TAILQ_FOREACH_REVERSE(search, &sc->all_levels, cf_level_lst, link) { 68788c9b54cSNate Lawson /* Add each setting to the level, duplicating if necessary. */ 68888c9b54cSNate Lawson for (i = 0; i < set_arr->count; i++) { 68988c9b54cSNate Lawson set = &set_arr->sets[i]; 69088c9b54cSNate Lawson 69188c9b54cSNate Lawson /* 69288c9b54cSNate Lawson * If this setting is less than 100%, split the level 69388c9b54cSNate Lawson * into two and add this setting to the new level. 69488c9b54cSNate Lawson */ 69588c9b54cSNate Lawson fill = search; 6965308b2a6SNate Lawson if (set->freq < 10000) { 69788c9b54cSNate Lawson fill = cpufreq_dup_set(sc, search, set); 69888c9b54cSNate Lawson 69988c9b54cSNate Lawson /* 7005308b2a6SNate Lawson * The new level was a duplicate of an existing 7015308b2a6SNate Lawson * level or its absolute setting is too high 7025308b2a6SNate Lawson * so we freed it. For example, we discard a 7035308b2a6SNate Lawson * derived level of 1000 MHz/25% if a level 7045308b2a6SNate Lawson * of 500 MHz/100% already exists. 70588c9b54cSNate Lawson */ 70688c9b54cSNate Lawson if (fill == NULL) 7075308b2a6SNate Lawson break; 7085308b2a6SNate Lawson } 70988c9b54cSNate Lawson 71088c9b54cSNate Lawson /* Add this setting to the existing or new level. */ 71188c9b54cSNate Lawson KASSERT(fill->rel_count < MAX_SETTINGS, 71288c9b54cSNate Lawson ("cpufreq: too many relative drivers (%d)", 71388c9b54cSNate Lawson MAX_SETTINGS)); 71488c9b54cSNate Lawson fill->rel_set[fill->rel_count] = *set; 71588c9b54cSNate Lawson fill->rel_count++; 7168d913481SNate Lawson CF_DEBUG( 7178d913481SNate Lawson "expand set added rel setting %d%% to %d level\n", 7188d913481SNate Lawson set->freq / 100, fill->total_set.freq); 71988c9b54cSNate Lawson } 72088c9b54cSNate Lawson } 72188c9b54cSNate Lawson 72288c9b54cSNate Lawson return (0); 72388c9b54cSNate Lawson } 72488c9b54cSNate Lawson 72588c9b54cSNate Lawson static struct cf_level * 72688c9b54cSNate Lawson cpufreq_dup_set(struct cpufreq_softc *sc, struct cf_level *dup, 72788c9b54cSNate Lawson struct cf_setting *set) 72888c9b54cSNate Lawson { 72988c9b54cSNate Lawson struct cf_level_lst *list; 73088c9b54cSNate Lawson struct cf_level *fill, *itr; 73188c9b54cSNate Lawson struct cf_setting *fill_set, *itr_set; 73288c9b54cSNate Lawson int i; 73388c9b54cSNate Lawson 734789f03ceSNate Lawson CF_MTX_ASSERT(&sc->lock); 735789f03ceSNate Lawson 73688c9b54cSNate Lawson /* 73788c9b54cSNate Lawson * Create a new level, copy it from the old one, and update the 73888c9b54cSNate Lawson * total frequency and power by the percentage specified in the 73988c9b54cSNate Lawson * relative setting. 74088c9b54cSNate Lawson */ 74188c9b54cSNate Lawson fill = malloc(sizeof(*fill), M_TEMP, M_NOWAIT); 74288c9b54cSNate Lawson if (fill == NULL) 74388c9b54cSNate Lawson return (NULL); 74488c9b54cSNate Lawson *fill = *dup; 74588c9b54cSNate Lawson fill_set = &fill->total_set; 74688c9b54cSNate Lawson fill_set->freq = 74788c9b54cSNate Lawson ((uint64_t)fill_set->freq * set->freq) / 10000; 74888c9b54cSNate Lawson if (fill_set->power != CPUFREQ_VAL_UNKNOWN) { 74988c9b54cSNate Lawson fill_set->power = ((uint64_t)fill_set->power * set->freq) 75088c9b54cSNate Lawson / 10000; 75188c9b54cSNate Lawson } 75288c9b54cSNate Lawson if (set->lat != CPUFREQ_VAL_UNKNOWN) { 75388c9b54cSNate Lawson if (fill_set->lat != CPUFREQ_VAL_UNKNOWN) 75488c9b54cSNate Lawson fill_set->lat += set->lat; 75588c9b54cSNate Lawson else 75688c9b54cSNate Lawson fill_set->lat = set->lat; 75788c9b54cSNate Lawson } 7588d913481SNate Lawson CF_DEBUG("dup set considering derived setting %d\n", fill_set->freq); 75988c9b54cSNate Lawson 76088c9b54cSNate Lawson /* 76188c9b54cSNate Lawson * If we copied an old level that we already modified (say, at 100%), 76288c9b54cSNate Lawson * we need to remove that setting before adding this one. Since we 76388c9b54cSNate Lawson * process each setting array in order, we know any settings for this 76488c9b54cSNate Lawson * driver will be found at the end. 76588c9b54cSNate Lawson */ 76688c9b54cSNate Lawson for (i = fill->rel_count; i != 0; i--) { 76788c9b54cSNate Lawson if (fill->rel_set[i - 1].dev != set->dev) 76888c9b54cSNate Lawson break; 7698d913481SNate Lawson CF_DEBUG("removed last relative driver: %s\n", 7708d913481SNate Lawson device_get_nameunit(set->dev)); 77188c9b54cSNate Lawson fill->rel_count--; 77288c9b54cSNate Lawson } 77388c9b54cSNate Lawson 77488c9b54cSNate Lawson /* 7755308b2a6SNate Lawson * Insert the new level in sorted order. If it is a duplicate of an 7765308b2a6SNate Lawson * existing level (1) or has an absolute setting higher than the 7775308b2a6SNate Lawson * existing level (2), do not add it. We can do this since any such 7785308b2a6SNate Lawson * level is guaranteed use less power. For example (1), a level with 7795308b2a6SNate Lawson * one absolute setting of 800 Mhz uses less power than one composed 7805308b2a6SNate Lawson * of an absolute setting of 1600 Mhz and a relative setting at 50%. 7815308b2a6SNate Lawson * Also for example (2), a level of 800 Mhz/75% is preferable to 7825308b2a6SNate Lawson * 1600 Mhz/25% even though the latter has a lower total frequency. 78388c9b54cSNate Lawson */ 78488c9b54cSNate Lawson list = &sc->all_levels; 7855308b2a6SNate Lawson KASSERT(!TAILQ_EMPTY(list), ("all levels list empty in dup set")); 78688c9b54cSNate Lawson TAILQ_FOREACH_REVERSE(itr, list, cf_level_lst, link) { 78788c9b54cSNate Lawson itr_set = &itr->total_set; 7889000b91eSNate Lawson if (CPUFREQ_CMP(fill_set->freq, itr_set->freq)) { 7899000b91eSNate Lawson CF_DEBUG("dup set rejecting %d (dupe)\n", 7909000b91eSNate Lawson fill_set->freq); 7919000b91eSNate Lawson itr = NULL; 7929000b91eSNate Lawson break; 7939000b91eSNate Lawson } else if (fill_set->freq < itr_set->freq) { 7949000b91eSNate Lawson if (fill->abs_set.freq <= itr->abs_set.freq) { 7958d913481SNate Lawson CF_DEBUG( 7968d913481SNate Lawson "dup done, inserting new level %d after %d\n", 7978d913481SNate Lawson fill_set->freq, itr_set->freq); 79888c9b54cSNate Lawson TAILQ_INSERT_AFTER(list, itr, fill, link); 79988c9b54cSNate Lawson sc->all_count++; 8009000b91eSNate Lawson } else { 8019000b91eSNate Lawson CF_DEBUG("dup set rejecting %d (abs too big)\n", 8029000b91eSNate Lawson fill_set->freq); 8039000b91eSNate Lawson itr = NULL; 8049000b91eSNate Lawson } 80588c9b54cSNate Lawson break; 80688c9b54cSNate Lawson } 80788c9b54cSNate Lawson } 8085308b2a6SNate Lawson 8095308b2a6SNate Lawson /* We didn't find a good place for this new level so free it. */ 8105308b2a6SNate Lawson if (itr == NULL) { 8115308b2a6SNate Lawson CF_DEBUG("dup set freeing new level %d (not optimal)\n", 8125308b2a6SNate Lawson fill_set->freq); 8135308b2a6SNate Lawson free(fill, M_TEMP); 8145308b2a6SNate Lawson fill = NULL; 81588c9b54cSNate Lawson } 81688c9b54cSNate Lawson 81788c9b54cSNate Lawson return (fill); 81888c9b54cSNate Lawson } 81988c9b54cSNate Lawson 82073347b07SNate Lawson static int 82173347b07SNate Lawson cpufreq_curr_sysctl(SYSCTL_HANDLER_ARGS) 82273347b07SNate Lawson { 82373347b07SNate Lawson struct cpufreq_softc *sc; 82473347b07SNate Lawson struct cf_level *levels; 8250325089dSNate Lawson int count, devcount, error, freq, i, n; 8260325089dSNate Lawson device_t *devs; 82773347b07SNate Lawson 8280325089dSNate Lawson devs = NULL; 82973347b07SNate Lawson sc = oidp->oid_arg1; 8300325089dSNate Lawson levels = malloc(CF_MAX_LEVELS * sizeof(*levels), M_TEMP, M_NOWAIT); 83173347b07SNate Lawson if (levels == NULL) 83273347b07SNate Lawson return (ENOMEM); 83373347b07SNate Lawson 83473347b07SNate Lawson error = CPUFREQ_GET(sc->dev, &levels[0]); 83573347b07SNate Lawson if (error) 83673347b07SNate Lawson goto out; 83773347b07SNate Lawson freq = levels[0].total_set.freq; 83873347b07SNate Lawson error = sysctl_handle_int(oidp, &freq, 0, req); 83973347b07SNate Lawson if (error != 0 || req->newptr == NULL) 84073347b07SNate Lawson goto out; 84173347b07SNate Lawson 8420325089dSNate Lawson /* 8430325089dSNate Lawson * While we only call cpufreq_get() on one device (assuming all 8440325089dSNate Lawson * CPUs have equal levels), we call cpufreq_set() on all CPUs. 8450325089dSNate Lawson * This is needed for some MP systems. 8460325089dSNate Lawson */ 8470325089dSNate Lawson error = devclass_get_devices(cpufreq_dc, &devs, &devcount); 84873347b07SNate Lawson if (error) 84973347b07SNate Lawson goto out; 8500325089dSNate Lawson for (n = 0; n < devcount; n++) { 8510325089dSNate Lawson count = CF_MAX_LEVELS; 8520325089dSNate Lawson error = CPUFREQ_LEVELS(devs[n], levels, &count); 853d269386aSNate Lawson if (error) { 854d269386aSNate Lawson if (error == E2BIG) 855d269386aSNate Lawson printf( 856d269386aSNate Lawson "cpufreq: need to increase CF_MAX_LEVELS\n"); 8570325089dSNate Lawson break; 858d269386aSNate Lawson } 85973347b07SNate Lawson for (i = 0; i < count; i++) { 86073347b07SNate Lawson if (CPUFREQ_CMP(levels[i].total_set.freq, freq)) { 8610325089dSNate Lawson error = CPUFREQ_SET(devs[n], &levels[i], 86273347b07SNate Lawson CPUFREQ_PRIO_USER); 86373347b07SNate Lawson break; 86473347b07SNate Lawson } 86573347b07SNate Lawson } 8660325089dSNate Lawson if (i == count) { 86773347b07SNate Lawson error = EINVAL; 8680325089dSNate Lawson break; 8690325089dSNate Lawson } 8700325089dSNate Lawson } 87173347b07SNate Lawson 87273347b07SNate Lawson out: 8730325089dSNate Lawson if (devs) 8740325089dSNate Lawson free(devs, M_TEMP); 87573347b07SNate Lawson if (levels) 87673347b07SNate Lawson free(levels, M_TEMP); 87773347b07SNate Lawson return (error); 87873347b07SNate Lawson } 87973347b07SNate Lawson 88073347b07SNate Lawson static int 88173347b07SNate Lawson cpufreq_levels_sysctl(SYSCTL_HANDLER_ARGS) 88273347b07SNate Lawson { 88373347b07SNate Lawson struct cpufreq_softc *sc; 88473347b07SNate Lawson struct cf_level *levels; 88573347b07SNate Lawson struct cf_setting *set; 88673347b07SNate Lawson struct sbuf sb; 88773347b07SNate Lawson int count, error, i; 88873347b07SNate Lawson 88973347b07SNate Lawson sc = oidp->oid_arg1; 89073347b07SNate Lawson sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND); 89173347b07SNate Lawson 89273347b07SNate Lawson /* Get settings from the device and generate the output string. */ 89373347b07SNate Lawson count = CF_MAX_LEVELS; 89473347b07SNate Lawson levels = malloc(count * sizeof(*levels), M_TEMP, M_NOWAIT); 89573347b07SNate Lawson if (levels == NULL) 89673347b07SNate Lawson return (ENOMEM); 89773347b07SNate Lawson error = CPUFREQ_LEVELS(sc->dev, levels, &count); 898d269386aSNate Lawson if (error) { 899d269386aSNate Lawson if (error == E2BIG) 900d269386aSNate Lawson printf("cpufreq: need to increase CF_MAX_LEVELS\n"); 90173347b07SNate Lawson goto out; 902d269386aSNate Lawson } 90373347b07SNate Lawson if (count) { 90473347b07SNate Lawson for (i = 0; i < count; i++) { 90573347b07SNate Lawson set = &levels[i].total_set; 90673347b07SNate Lawson sbuf_printf(&sb, "%d/%d ", set->freq, set->power); 90773347b07SNate Lawson } 90873347b07SNate Lawson } else 90973347b07SNate Lawson sbuf_cpy(&sb, "0"); 91073347b07SNate Lawson sbuf_trim(&sb); 91173347b07SNate Lawson sbuf_finish(&sb); 91273347b07SNate Lawson error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 91373347b07SNate Lawson 91473347b07SNate Lawson out: 91573347b07SNate Lawson free(levels, M_TEMP); 91673347b07SNate Lawson sbuf_delete(&sb); 91773347b07SNate Lawson return (error); 91873347b07SNate Lawson } 91973347b07SNate Lawson 920e959a70bSNate Lawson static int 921e959a70bSNate Lawson cpufreq_settings_sysctl(SYSCTL_HANDLER_ARGS) 922e959a70bSNate Lawson { 923e959a70bSNate Lawson device_t dev; 924e959a70bSNate Lawson struct cf_setting *sets; 925e959a70bSNate Lawson struct sbuf sb; 926e959a70bSNate Lawson int error, i, set_count; 927e959a70bSNate Lawson 928e959a70bSNate Lawson dev = oidp->oid_arg1; 929e959a70bSNate Lawson sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND); 930e959a70bSNate Lawson 931e959a70bSNate Lawson /* Get settings from the device and generate the output string. */ 932e959a70bSNate Lawson set_count = MAX_SETTINGS; 933e959a70bSNate Lawson sets = malloc(set_count * sizeof(*sets), M_TEMP, M_NOWAIT); 934e959a70bSNate Lawson if (sets == NULL) 935e959a70bSNate Lawson return (ENOMEM); 936e959a70bSNate Lawson error = CPUFREQ_DRV_SETTINGS(dev, sets, &set_count); 937e959a70bSNate Lawson if (error) 938e959a70bSNate Lawson goto out; 939e959a70bSNate Lawson if (set_count) { 940e959a70bSNate Lawson for (i = 0; i < set_count; i++) 941e959a70bSNate Lawson sbuf_printf(&sb, "%d/%d ", sets[i].freq, sets[i].power); 942e959a70bSNate Lawson } else 943e959a70bSNate Lawson sbuf_cpy(&sb, "0"); 944e959a70bSNate Lawson sbuf_trim(&sb); 945e959a70bSNate Lawson sbuf_finish(&sb); 946e959a70bSNate Lawson error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 947e959a70bSNate Lawson 948e959a70bSNate Lawson out: 949e959a70bSNate Lawson free(sets, M_TEMP); 950e959a70bSNate Lawson sbuf_delete(&sb); 951e959a70bSNate Lawson return (error); 952e959a70bSNate Lawson } 953e959a70bSNate Lawson 95473347b07SNate Lawson int 95573347b07SNate Lawson cpufreq_register(device_t dev) 95673347b07SNate Lawson { 95767c8649fSNate Lawson struct cpufreq_softc *sc; 95873347b07SNate Lawson device_t cf_dev, cpu_dev; 95973347b07SNate Lawson 960e959a70bSNate Lawson /* Add a sysctl to get each driver's settings separately. */ 961e959a70bSNate Lawson SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 962e959a70bSNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 963e959a70bSNate Lawson OID_AUTO, "freq_settings", CTLTYPE_STRING | CTLFLAG_RD, dev, 0, 964e959a70bSNate Lawson cpufreq_settings_sysctl, "A", "CPU frequency driver settings"); 965e959a70bSNate Lawson 96673347b07SNate Lawson /* 9670325089dSNate Lawson * Add only one cpufreq device to each CPU. Currently, all CPUs 9680325089dSNate Lawson * must offer the same levels and be switched at the same time. 96973347b07SNate Lawson */ 9700325089dSNate Lawson cpu_dev = device_get_parent(dev); 97167c8649fSNate Lawson if ((cf_dev = device_find_child(cpu_dev, "cpufreq", -1))) { 97267c8649fSNate Lawson sc = device_get_softc(cf_dev); 97367c8649fSNate Lawson sc->max_mhz = CPUFREQ_VAL_UNKNOWN; 97473347b07SNate Lawson return (0); 97567c8649fSNate Lawson } 97673347b07SNate Lawson 9770325089dSNate Lawson /* Add the child device and possibly sysctls. */ 9780325089dSNate Lawson cf_dev = BUS_ADD_CHILD(cpu_dev, 0, "cpufreq", -1); 97973347b07SNate Lawson if (cf_dev == NULL) 98073347b07SNate Lawson return (ENOMEM); 98173347b07SNate Lawson device_quiet(cf_dev); 98273347b07SNate Lawson 98373347b07SNate Lawson return (device_probe_and_attach(cf_dev)); 98473347b07SNate Lawson } 98573347b07SNate Lawson 98673347b07SNate Lawson int 98773347b07SNate Lawson cpufreq_unregister(device_t dev) 98873347b07SNate Lawson { 98973347b07SNate Lawson device_t cf_dev, *devs; 990e94a0c1aSNate Lawson int cfcount, devcount, error, i, type; 99173347b07SNate Lawson 99273347b07SNate Lawson /* 99373347b07SNate Lawson * If this is the last cpufreq child device, remove the control 99473347b07SNate Lawson * device as well. We identify cpufreq children by calling a method 99573347b07SNate Lawson * they support. 99673347b07SNate Lawson */ 99773347b07SNate Lawson error = device_get_children(device_get_parent(dev), &devs, &devcount); 99873347b07SNate Lawson if (error) 99973347b07SNate Lawson return (error); 100067c8649fSNate Lawson cf_dev = device_find_child(device_get_parent(dev), "cpufreq", -1); 100171ab130cSNate Lawson if (cf_dev == NULL) { 100271ab130cSNate Lawson device_printf(dev, 100371ab130cSNate Lawson "warning: cpufreq_unregister called with no cpufreq device active\n"); 100471ab130cSNate Lawson return (0); 100571ab130cSNate Lawson } 100673347b07SNate Lawson cfcount = 0; 100773347b07SNate Lawson for (i = 0; i < devcount; i++) { 100873347b07SNate Lawson if (!device_is_attached(devs[i])) 100973347b07SNate Lawson continue; 1010e94a0c1aSNate Lawson if (CPUFREQ_DRV_TYPE(devs[i], &type) == 0) 101173347b07SNate Lawson cfcount++; 101273347b07SNate Lawson } 10130325089dSNate Lawson if (cfcount <= 1) 101473347b07SNate Lawson device_delete_child(device_get_parent(cf_dev), cf_dev); 101573347b07SNate Lawson free(devs, M_TEMP); 101673347b07SNate Lawson 101773347b07SNate Lawson return (0); 101873347b07SNate Lawson } 10190d4ac62aSNate Lawson 10200d4ac62aSNate Lawson int 10210d4ac62aSNate Lawson cpufreq_settings_changed(device_t dev) 10220d4ac62aSNate Lawson { 10230d4ac62aSNate Lawson 10240d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_levels_changed, 10250d4ac62aSNate Lawson device_get_unit(device_get_parent(dev))); 10260d4ac62aSNate Lawson return (0); 10270d4ac62aSNate Lawson } 1028