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; 147d288bcc4SAlexander Motin struct pcpu *pc; 14873347b07SNate Lawson device_t parent; 149d288bcc4SAlexander Motin uint64_t rate; 15073347b07SNate Lawson int numdevs; 15173347b07SNate Lawson 1528d913481SNate Lawson CF_DEBUG("initializing %s\n", device_get_nameunit(dev)); 15373347b07SNate Lawson sc = device_get_softc(dev); 15473347b07SNate Lawson parent = device_get_parent(dev); 15573347b07SNate Lawson sc->dev = dev; 15673347b07SNate Lawson sysctl_ctx_init(&sc->sysctl_ctx); 15773347b07SNate Lawson TAILQ_INIT(&sc->all_levels); 158789f03ceSNate Lawson CF_MTX_INIT(&sc->lock); 15973347b07SNate Lawson sc->curr_level.total_set.freq = CPUFREQ_VAL_UNKNOWN; 16056e5a87aSHajimu UMEMOTO SLIST_INIT(&sc->saved_freq); 161f436f175SNathan Whitehorn /* Try to get nominal CPU freq to use it as maximum later if needed */ 162f436f175SNathan Whitehorn sc->max_mhz = cpu_get_nominal_mhz(dev); 163f436f175SNathan Whitehorn /* If that fails, try to measure the current rate */ 164f436f175SNathan Whitehorn if (sc->max_mhz <= 0) { 165d288bcc4SAlexander Motin pc = cpu_get_pcpu(dev); 166d288bcc4SAlexander Motin if (cpu_est_clockrate(pc->pc_cpuid, &rate) == 0) 167d288bcc4SAlexander Motin sc->max_mhz = rate / 1000000; 168d288bcc4SAlexander Motin else 16967c8649fSNate Lawson sc->max_mhz = CPUFREQ_VAL_UNKNOWN; 170f436f175SNathan Whitehorn } 17173347b07SNate Lawson 17273347b07SNate Lawson /* 17373347b07SNate Lawson * Only initialize one set of sysctls for all CPUs. In the future, 17473347b07SNate Lawson * if multiple CPUs can have different settings, we can move these 17573347b07SNate Lawson * sysctls to be under every CPU instead of just the first one. 17673347b07SNate Lawson */ 17773347b07SNate Lawson numdevs = devclass_get_count(cpufreq_dc); 17873347b07SNate Lawson if (numdevs > 1) 17973347b07SNate Lawson return (0); 18073347b07SNate Lawson 1818d913481SNate Lawson CF_DEBUG("initializing one-time data for %s\n", 1828d913481SNate Lawson device_get_nameunit(dev)); 18373347b07SNate Lawson SYSCTL_ADD_PROC(&sc->sysctl_ctx, 18473347b07SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(parent)), 18573347b07SNate Lawson OID_AUTO, "freq", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 18673347b07SNate Lawson cpufreq_curr_sysctl, "I", "Current CPU frequency"); 18773347b07SNate Lawson SYSCTL_ADD_PROC(&sc->sysctl_ctx, 18873347b07SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(parent)), 18973347b07SNate Lawson OID_AUTO, "freq_levels", CTLTYPE_STRING | CTLFLAG_RD, sc, 0, 19073347b07SNate Lawson cpufreq_levels_sysctl, "A", "CPU frequency levels"); 1910d4ac62aSNate Lawson 1920d4ac62aSNate Lawson /* 1930d4ac62aSNate Lawson * Queue a one-shot broadcast that levels have changed. 1940d4ac62aSNate Lawson * It will run once the system has completed booting. 1950d4ac62aSNate Lawson */ 1960d4ac62aSNate Lawson TASK_INIT(&sc->startup_task, 0, cpufreq_startup_task, dev); 1970d4ac62aSNate Lawson taskqueue_enqueue(taskqueue_thread, &sc->startup_task); 19873347b07SNate Lawson 19973347b07SNate Lawson return (0); 20073347b07SNate Lawson } 20173347b07SNate Lawson 2020d4ac62aSNate Lawson /* Handle any work to be done for all drivers that attached during boot. */ 2030d4ac62aSNate Lawson static void 2040d4ac62aSNate Lawson cpufreq_startup_task(void *ctx, int pending) 2050d4ac62aSNate Lawson { 2060d4ac62aSNate Lawson 2070d4ac62aSNate Lawson cpufreq_settings_changed((device_t)ctx); 2080d4ac62aSNate Lawson } 2090d4ac62aSNate Lawson 21073347b07SNate Lawson static int 21173347b07SNate Lawson cpufreq_detach(device_t dev) 21273347b07SNate Lawson { 21373347b07SNate Lawson struct cpufreq_softc *sc; 21456e5a87aSHajimu UMEMOTO struct cf_saved_freq *saved_freq; 21573347b07SNate Lawson int numdevs; 21673347b07SNate Lawson 2178d913481SNate Lawson CF_DEBUG("shutdown %s\n", device_get_nameunit(dev)); 21873347b07SNate Lawson sc = device_get_softc(dev); 21973347b07SNate Lawson sysctl_ctx_free(&sc->sysctl_ctx); 22073347b07SNate Lawson 22156e5a87aSHajimu UMEMOTO while ((saved_freq = SLIST_FIRST(&sc->saved_freq)) != NULL) { 22256e5a87aSHajimu UMEMOTO SLIST_REMOVE_HEAD(&sc->saved_freq, link); 22356e5a87aSHajimu UMEMOTO free(saved_freq, M_TEMP); 22456e5a87aSHajimu UMEMOTO } 22556e5a87aSHajimu UMEMOTO 22673347b07SNate Lawson /* Only clean up these resources when the last device is detaching. */ 22773347b07SNate Lawson numdevs = devclass_get_count(cpufreq_dc); 2288d913481SNate Lawson if (numdevs == 1) { 2298d913481SNate Lawson CF_DEBUG("final shutdown for %s\n", device_get_nameunit(dev)); 2308d913481SNate Lawson } 23173347b07SNate Lawson 23273347b07SNate Lawson return (0); 23373347b07SNate Lawson } 23473347b07SNate Lawson 23573347b07SNate Lawson static int 23673347b07SNate Lawson cf_set_method(device_t dev, const struct cf_level *level, int priority) 23773347b07SNate Lawson { 23873347b07SNate Lawson struct cpufreq_softc *sc; 23973347b07SNate Lawson const struct cf_setting *set; 24056e5a87aSHajimu UMEMOTO struct cf_saved_freq *saved_freq, *curr_freq; 2410325089dSNate Lawson struct pcpu *pc; 24262db376aSNate Lawson int error, i; 24373347b07SNate Lawson 24473347b07SNate Lawson sc = device_get_softc(dev); 245789f03ceSNate Lawson error = 0; 246789f03ceSNate Lawson set = NULL; 24756e5a87aSHajimu UMEMOTO saved_freq = NULL; 24873347b07SNate Lawson 2490d4ac62aSNate Lawson /* We are going to change levels so notify the pre-change handler. */ 2500d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_pre_change, level, &error); 2510d4ac62aSNate Lawson if (error != 0) { 2520d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_post_change, level, error); 2530d4ac62aSNate Lawson return (error); 254b4130b8aSMarcus Alves Grando } 2550325089dSNate Lawson 256789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 25756e5a87aSHajimu UMEMOTO 258a15e947dSNate Lawson #ifdef SMP 259a15e947dSNate Lawson /* 260a15e947dSNate Lawson * If still booting and secondary CPUs not started yet, don't allow 261a15e947dSNate Lawson * changing the frequency until they're online. This is because we 262a15e947dSNate Lawson * can't switch to them using sched_bind() and thus we'd only be 263a15e947dSNate Lawson * switching the main CPU. XXXTODO: Need to think more about how to 264a15e947dSNate Lawson * handle having different CPUs at different frequencies. 265a15e947dSNate Lawson */ 266a15e947dSNate Lawson if (mp_ncpus > 1 && !smp_active) { 267a15e947dSNate Lawson device_printf(dev, "rejecting change, SMP not started yet\n"); 268a15e947dSNate Lawson error = ENXIO; 269a15e947dSNate Lawson goto out; 270a15e947dSNate Lawson } 271a15e947dSNate Lawson #endif /* SMP */ 272a15e947dSNate Lawson 27356e5a87aSHajimu UMEMOTO /* 27456e5a87aSHajimu UMEMOTO * If the requested level has a lower priority, don't allow 27556e5a87aSHajimu UMEMOTO * the new level right now. 27656e5a87aSHajimu UMEMOTO */ 27756e5a87aSHajimu UMEMOTO if (priority < sc->curr_priority) { 2788d913481SNate Lawson CF_DEBUG("ignoring, curr prio %d less than %d\n", priority, 2798d913481SNate Lawson sc->curr_priority); 280789f03ceSNate Lawson error = EPERM; 281789f03ceSNate Lawson goto out; 282789f03ceSNate Lawson } 2835f0afa04SNate Lawson 28456e5a87aSHajimu UMEMOTO /* 28556e5a87aSHajimu UMEMOTO * If the caller didn't specify a level and one is saved, prepare to 28656e5a87aSHajimu UMEMOTO * restore the saved level. If none has been saved, return an error. 28756e5a87aSHajimu UMEMOTO */ 28856e5a87aSHajimu UMEMOTO if (level == NULL) { 28956e5a87aSHajimu UMEMOTO saved_freq = SLIST_FIRST(&sc->saved_freq); 29056e5a87aSHajimu UMEMOTO if (saved_freq == NULL) { 29156e5a87aSHajimu UMEMOTO CF_DEBUG("NULL level, no saved level\n"); 29256e5a87aSHajimu UMEMOTO error = ENXIO; 29356e5a87aSHajimu UMEMOTO goto out; 29456e5a87aSHajimu UMEMOTO } 29556e5a87aSHajimu UMEMOTO level = &saved_freq->level; 29656e5a87aSHajimu UMEMOTO priority = saved_freq->priority; 29756e5a87aSHajimu UMEMOTO CF_DEBUG("restoring saved level, freq %d prio %d\n", 29856e5a87aSHajimu UMEMOTO level->total_set.freq, priority); 29956e5a87aSHajimu UMEMOTO } 30056e5a87aSHajimu UMEMOTO 301b070969bSNate Lawson /* Reject levels that are below our specified threshold. */ 302da8a77c1SNate Lawson if (level->total_set.freq < cf_lowest_freq) { 3038d913481SNate Lawson CF_DEBUG("rejecting freq %d, less than %d limit\n", 3048d913481SNate Lawson level->total_set.freq, cf_lowest_freq); 305789f03ceSNate Lawson error = EINVAL; 306789f03ceSNate Lawson goto out; 307789f03ceSNate Lawson } 308b070969bSNate Lawson 30973347b07SNate Lawson /* If already at this level, just return. */ 3108d913481SNate Lawson if (CPUFREQ_CMP(sc->curr_level.total_set.freq, level->total_set.freq)) { 3118d913481SNate Lawson CF_DEBUG("skipping freq %d, same as current level %d\n", 3128d913481SNate Lawson level->total_set.freq, sc->curr_level.total_set.freq); 3131fea6ce7SHajimu UMEMOTO goto skip; 3148d913481SNate Lawson } 31573347b07SNate Lawson 31673347b07SNate Lawson /* First, set the absolute frequency via its driver. */ 31773347b07SNate Lawson set = &level->abs_set; 31873347b07SNate Lawson if (set->dev) { 31973347b07SNate Lawson if (!device_is_attached(set->dev)) { 32073347b07SNate Lawson error = ENXIO; 32173347b07SNate Lawson goto out; 32273347b07SNate Lawson } 3231196826aSNate Lawson 32462db376aSNate Lawson /* Bind to the target CPU before switching. */ 3251196826aSNate Lawson pc = cpu_get_pcpu(set->dev); 326982d11f8SJeff Roberson thread_lock(curthread); 3271196826aSNate Lawson sched_bind(curthread, pc->pc_cpuid); 328982d11f8SJeff Roberson thread_unlock(curthread); 3298d913481SNate Lawson CF_DEBUG("setting abs freq %d on %s (cpu %d)\n", set->freq, 3308d913481SNate Lawson device_get_nameunit(set->dev), PCPU_GET(cpuid)); 33173347b07SNate Lawson error = CPUFREQ_DRV_SET(set->dev, set); 332982d11f8SJeff Roberson thread_lock(curthread); 3331196826aSNate Lawson sched_unbind(curthread); 334982d11f8SJeff Roberson thread_unlock(curthread); 33573347b07SNate Lawson if (error) { 33673347b07SNate Lawson goto out; 33773347b07SNate Lawson } 33873347b07SNate Lawson } 33973347b07SNate Lawson 34088c9b54cSNate Lawson /* Next, set any/all relative frequencies via their drivers. */ 34188c9b54cSNate Lawson for (i = 0; i < level->rel_count; i++) { 34288c9b54cSNate Lawson set = &level->rel_set[i]; 34388c9b54cSNate Lawson if (!device_is_attached(set->dev)) { 34488c9b54cSNate Lawson error = ENXIO; 34588c9b54cSNate Lawson goto out; 34688c9b54cSNate Lawson } 3471196826aSNate Lawson 34862db376aSNate Lawson /* Bind to the target CPU before switching. */ 3491196826aSNate Lawson pc = cpu_get_pcpu(set->dev); 350982d11f8SJeff Roberson thread_lock(curthread); 3511196826aSNate Lawson sched_bind(curthread, pc->pc_cpuid); 352982d11f8SJeff Roberson thread_unlock(curthread); 3538d913481SNate Lawson CF_DEBUG("setting rel freq %d on %s (cpu %d)\n", set->freq, 3548d913481SNate Lawson device_get_nameunit(set->dev), PCPU_GET(cpuid)); 35588c9b54cSNate Lawson error = CPUFREQ_DRV_SET(set->dev, set); 356982d11f8SJeff Roberson thread_lock(curthread); 3571196826aSNate Lawson sched_unbind(curthread); 358982d11f8SJeff Roberson thread_unlock(curthread); 35988c9b54cSNate Lawson if (error) { 36088c9b54cSNate Lawson /* XXX Back out any successful setting? */ 36188c9b54cSNate Lawson goto out; 36288c9b54cSNate Lawson } 36388c9b54cSNate Lawson } 36473347b07SNate Lawson 3651fea6ce7SHajimu UMEMOTO skip: 3665f0afa04SNate Lawson /* 3675f0afa04SNate Lawson * Before recording the current level, check if we're going to a 36856e5a87aSHajimu UMEMOTO * higher priority. If so, save the previous level and priority. 3695f0afa04SNate Lawson */ 3705f0afa04SNate Lawson if (sc->curr_level.total_set.freq != CPUFREQ_VAL_UNKNOWN && 37156e5a87aSHajimu UMEMOTO priority > sc->curr_priority) { 3728d913481SNate Lawson CF_DEBUG("saving level, freq %d prio %d\n", 3738d913481SNate Lawson sc->curr_level.total_set.freq, sc->curr_priority); 37456e5a87aSHajimu UMEMOTO curr_freq = malloc(sizeof(*curr_freq), M_TEMP, M_NOWAIT); 37556e5a87aSHajimu UMEMOTO if (curr_freq == NULL) { 37656e5a87aSHajimu UMEMOTO error = ENOMEM; 37756e5a87aSHajimu UMEMOTO goto out; 37856e5a87aSHajimu UMEMOTO } 37956e5a87aSHajimu UMEMOTO curr_freq->level = sc->curr_level; 38056e5a87aSHajimu UMEMOTO curr_freq->priority = sc->curr_priority; 38156e5a87aSHajimu UMEMOTO SLIST_INSERT_HEAD(&sc->saved_freq, curr_freq, link); 3825f0afa04SNate Lawson } 38373347b07SNate Lawson sc->curr_level = *level; 3845f0afa04SNate Lawson sc->curr_priority = priority; 38573347b07SNate Lawson 38656e5a87aSHajimu UMEMOTO /* If we were restoring a saved state, reset it to "unused". */ 38756e5a87aSHajimu UMEMOTO if (saved_freq != NULL) { 38856e5a87aSHajimu UMEMOTO CF_DEBUG("resetting saved level\n"); 38956e5a87aSHajimu UMEMOTO sc->curr_level.total_set.freq = CPUFREQ_VAL_UNKNOWN; 39056e5a87aSHajimu UMEMOTO SLIST_REMOVE_HEAD(&sc->saved_freq, link); 39156e5a87aSHajimu UMEMOTO free(saved_freq, M_TEMP); 39256e5a87aSHajimu UMEMOTO } 39356e5a87aSHajimu UMEMOTO 39473347b07SNate Lawson out: 395789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 3960d4ac62aSNate Lawson 3970d4ac62aSNate Lawson /* 3980d4ac62aSNate Lawson * We changed levels (or attempted to) so notify the post-change 3990d4ac62aSNate Lawson * handler of new frequency or error. 4000d4ac62aSNate Lawson */ 4010d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_post_change, level, error); 402789f03ceSNate Lawson if (error && set) 40373347b07SNate Lawson device_printf(set->dev, "set freq failed, err %d\n", error); 4040d4ac62aSNate Lawson 40573347b07SNate Lawson return (error); 40673347b07SNate Lawson } 40773347b07SNate Lawson 40873347b07SNate Lawson static int 40973347b07SNate Lawson cf_get_method(device_t dev, struct cf_level *level) 41073347b07SNate Lawson { 41173347b07SNate Lawson struct cpufreq_softc *sc; 41273347b07SNate Lawson struct cf_level *levels; 41373347b07SNate Lawson struct cf_setting *curr_set, set; 41473347b07SNate Lawson struct pcpu *pc; 41573347b07SNate Lawson device_t *devs; 4162145b9d2SNate Lawson int count, error, i, n, numdevs; 41773347b07SNate Lawson uint64_t rate; 41873347b07SNate Lawson 41973347b07SNate Lawson sc = device_get_softc(dev); 420789f03ceSNate Lawson error = 0; 42173347b07SNate Lawson levels = NULL; 42273347b07SNate Lawson 42373347b07SNate Lawson /* If we already know the current frequency, we're done. */ 424789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 425789f03ceSNate Lawson curr_set = &sc->curr_level.total_set; 4268d913481SNate Lawson if (curr_set->freq != CPUFREQ_VAL_UNKNOWN) { 4278d913481SNate Lawson CF_DEBUG("get returning known freq %d\n", curr_set->freq); 42873347b07SNate Lawson goto out; 4298d913481SNate Lawson } 430789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 43173347b07SNate Lawson 43273347b07SNate Lawson /* 43373347b07SNate Lawson * We need to figure out the current level. Loop through every 43473347b07SNate Lawson * driver, getting the current setting. Then, attempt to get a best 43573347b07SNate Lawson * match of settings against each level. 43673347b07SNate Lawson */ 43773347b07SNate Lawson count = CF_MAX_LEVELS; 43873347b07SNate Lawson levels = malloc(count * sizeof(*levels), M_TEMP, M_NOWAIT); 43973347b07SNate Lawson if (levels == NULL) 44073347b07SNate Lawson return (ENOMEM); 44173347b07SNate Lawson error = CPUFREQ_LEVELS(sc->dev, levels, &count); 442d269386aSNate Lawson if (error) { 443d269386aSNate Lawson if (error == E2BIG) 444d269386aSNate Lawson printf("cpufreq: need to increase CF_MAX_LEVELS\n"); 445789f03ceSNate Lawson free(levels, M_TEMP); 446789f03ceSNate Lawson return (error); 447d269386aSNate Lawson } 44873347b07SNate Lawson error = device_get_children(device_get_parent(dev), &devs, &numdevs); 449789f03ceSNate Lawson if (error) { 450789f03ceSNate Lawson free(levels, M_TEMP); 451789f03ceSNate Lawson return (error); 452789f03ceSNate Lawson } 453789f03ceSNate Lawson 454789f03ceSNate Lawson /* 455789f03ceSNate Lawson * Reacquire the lock and search for the given level. 456789f03ceSNate Lawson * 457789f03ceSNate Lawson * XXX Note: this is not quite right since we really need to go 458789f03ceSNate Lawson * through each level and compare both absolute and relative 459789f03ceSNate Lawson * settings for each driver in the system before making a match. 460789f03ceSNate Lawson * The estimation code below catches this case though. 461789f03ceSNate Lawson */ 462789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 4632145b9d2SNate Lawson for (n = 0; n < numdevs && curr_set->freq == CPUFREQ_VAL_UNKNOWN; n++) { 4642145b9d2SNate Lawson if (!device_is_attached(devs[n])) 46573347b07SNate Lawson continue; 466be00f605SJohn Baldwin if (CPUFREQ_DRV_GET(devs[n], &set) != 0) 46773347b07SNate Lawson continue; 46873347b07SNate Lawson for (i = 0; i < count; i++) { 46988c9b54cSNate Lawson if (CPUFREQ_CMP(set.freq, levels[i].total_set.freq)) { 47073347b07SNate Lawson sc->curr_level = levels[i]; 47173347b07SNate Lawson break; 47273347b07SNate Lawson } 47373347b07SNate Lawson } 47473347b07SNate Lawson } 47573347b07SNate Lawson free(devs, M_TEMP); 4768d913481SNate Lawson if (curr_set->freq != CPUFREQ_VAL_UNKNOWN) { 4778d913481SNate Lawson CF_DEBUG("get matched freq %d from drivers\n", curr_set->freq); 47873347b07SNate Lawson goto out; 4798d913481SNate Lawson } 48073347b07SNate Lawson 48173347b07SNate Lawson /* 48273347b07SNate Lawson * We couldn't find an exact match, so attempt to estimate and then 48373347b07SNate Lawson * match against a level. 48473347b07SNate Lawson */ 48573347b07SNate Lawson pc = cpu_get_pcpu(dev); 48673347b07SNate Lawson if (pc == NULL) { 48773347b07SNate Lawson error = ENXIO; 48873347b07SNate Lawson goto out; 48973347b07SNate Lawson } 49073347b07SNate Lawson cpu_est_clockrate(pc->pc_cpuid, &rate); 49173347b07SNate Lawson rate /= 1000000; 49273347b07SNate Lawson for (i = 0; i < count; i++) { 49373347b07SNate Lawson if (CPUFREQ_CMP(rate, levels[i].total_set.freq)) { 49473347b07SNate Lawson sc->curr_level = levels[i]; 4958d913481SNate Lawson CF_DEBUG("get estimated freq %d\n", curr_set->freq); 496be00f605SJohn Baldwin goto out; 49773347b07SNate Lawson } 49873347b07SNate Lawson } 499be00f605SJohn Baldwin error = ENXIO; 50073347b07SNate Lawson 50173347b07SNate Lawson out: 502789f03ceSNate Lawson if (error == 0) 503789f03ceSNate Lawson *level = sc->curr_level; 504789f03ceSNate Lawson 505789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 50673347b07SNate Lawson if (levels) 50773347b07SNate Lawson free(levels, M_TEMP); 508789f03ceSNate Lawson return (error); 50973347b07SNate Lawson } 51073347b07SNate Lawson 51173347b07SNate Lawson static int 51273347b07SNate Lawson cf_levels_method(device_t dev, struct cf_level *levels, int *count) 51373347b07SNate Lawson { 51488c9b54cSNate Lawson struct cf_setting_array *set_arr; 51573347b07SNate Lawson struct cf_setting_lst rel_sets; 51673347b07SNate Lawson struct cpufreq_softc *sc; 51773347b07SNate Lawson struct cf_level *lev; 51873347b07SNate Lawson struct cf_setting *sets; 51973347b07SNate Lawson struct pcpu *pc; 52073347b07SNate Lawson device_t *devs; 52188c9b54cSNate Lawson int error, i, numdevs, set_count, type; 52273347b07SNate Lawson uint64_t rate; 52373347b07SNate Lawson 52473347b07SNate Lawson if (levels == NULL || count == NULL) 52573347b07SNate Lawson return (EINVAL); 52673347b07SNate Lawson 52773347b07SNate Lawson TAILQ_INIT(&rel_sets); 52873347b07SNate Lawson sc = device_get_softc(dev); 52973347b07SNate Lawson error = device_get_children(device_get_parent(dev), &devs, &numdevs); 53073347b07SNate Lawson if (error) 53173347b07SNate Lawson return (error); 53273347b07SNate Lawson sets = malloc(MAX_SETTINGS * sizeof(*sets), M_TEMP, M_NOWAIT); 53373347b07SNate Lawson if (sets == NULL) { 53473347b07SNate Lawson free(devs, M_TEMP); 53573347b07SNate Lawson return (ENOMEM); 53673347b07SNate Lawson } 53773347b07SNate Lawson 53873347b07SNate Lawson /* Get settings from all cpufreq drivers. */ 539789f03ceSNate Lawson CF_MTX_LOCK(&sc->lock); 54073347b07SNate Lawson for (i = 0; i < numdevs; i++) { 541e22cd41cSNate Lawson /* Skip devices that aren't ready. */ 54273347b07SNate Lawson if (!device_is_attached(devs[i])) 54373347b07SNate Lawson continue; 544e22cd41cSNate Lawson 545e22cd41cSNate Lawson /* 546e22cd41cSNate Lawson * Get settings, skipping drivers that offer no settings or 547e22cd41cSNate Lawson * provide settings for informational purposes only. 548e22cd41cSNate Lawson */ 549e94a0c1aSNate Lawson error = CPUFREQ_DRV_TYPE(devs[i], &type); 5508d913481SNate Lawson if (error || (type & CPUFREQ_FLAG_INFO_ONLY)) { 5518d913481SNate Lawson if (error == 0) { 5528d913481SNate Lawson CF_DEBUG("skipping info-only driver %s\n", 5538d913481SNate Lawson device_get_nameunit(devs[i])); 5548d913481SNate Lawson } 555e94a0c1aSNate Lawson continue; 5568d913481SNate Lawson } 55773347b07SNate Lawson set_count = MAX_SETTINGS; 558e94a0c1aSNate Lawson error = CPUFREQ_DRV_SETTINGS(devs[i], sets, &set_count); 559e94a0c1aSNate Lawson if (error || set_count == 0) 56073347b07SNate Lawson continue; 56173347b07SNate Lawson 562e22cd41cSNate Lawson /* Add the settings to our absolute/relative lists. */ 5630325089dSNate Lawson switch (type & CPUFREQ_TYPE_MASK) { 56488c9b54cSNate Lawson case CPUFREQ_TYPE_ABSOLUTE: 56588c9b54cSNate Lawson error = cpufreq_insert_abs(sc, sets, set_count); 56688c9b54cSNate Lawson break; 56788c9b54cSNate Lawson case CPUFREQ_TYPE_RELATIVE: 5688d913481SNate Lawson CF_DEBUG("adding %d relative settings\n", set_count); 56988c9b54cSNate Lawson set_arr = malloc(sizeof(*set_arr), M_TEMP, M_NOWAIT); 57088c9b54cSNate Lawson if (set_arr == NULL) { 57188c9b54cSNate Lawson error = ENOMEM; 57288c9b54cSNate Lawson goto out; 57388c9b54cSNate Lawson } 57488c9b54cSNate Lawson bcopy(sets, set_arr->sets, set_count * sizeof(*sets)); 57588c9b54cSNate Lawson set_arr->count = set_count; 57688c9b54cSNate Lawson TAILQ_INSERT_TAIL(&rel_sets, set_arr, link); 57788c9b54cSNate Lawson break; 57888c9b54cSNate Lawson default: 57988c9b54cSNate Lawson error = EINVAL; 58088c9b54cSNate Lawson } 58188c9b54cSNate Lawson if (error) 58273347b07SNate Lawson goto out; 58373347b07SNate Lawson } 58473347b07SNate Lawson 58567c8649fSNate Lawson /* 58667c8649fSNate Lawson * If there are no absolute levels, create a fake one at 100%. We 58767c8649fSNate Lawson * then cache the clockrate for later use as our base frequency. 58867c8649fSNate Lawson */ 58973347b07SNate Lawson if (TAILQ_EMPTY(&sc->all_levels)) { 59067c8649fSNate Lawson if (sc->max_mhz == CPUFREQ_VAL_UNKNOWN) { 591f436f175SNathan Whitehorn sc->max_mhz = cpu_get_nominal_mhz(dev); 592f436f175SNathan Whitehorn /* 593f436f175SNathan Whitehorn * If the CPU can't report a rate for 100%, hope 594f436f175SNathan Whitehorn * the CPU is running at its nominal rate right now, 595f436f175SNathan Whitehorn * and use that instead. 596f436f175SNathan Whitehorn */ 597f436f175SNathan Whitehorn if (sc->max_mhz <= 0) { 59873347b07SNate Lawson pc = cpu_get_pcpu(dev); 59973347b07SNate Lawson cpu_est_clockrate(pc->pc_cpuid, &rate); 60067c8649fSNate Lawson sc->max_mhz = rate / 1000000; 60167c8649fSNate Lawson } 602f436f175SNathan Whitehorn } 60367c8649fSNate Lawson memset(&sets[0], CPUFREQ_VAL_UNKNOWN, sizeof(*sets)); 60467c8649fSNate Lawson sets[0].freq = sc->max_mhz; 60567c8649fSNate Lawson sets[0].dev = NULL; 60688c9b54cSNate Lawson error = cpufreq_insert_abs(sc, sets, 1); 60773347b07SNate Lawson if (error) 60873347b07SNate Lawson goto out; 60973347b07SNate Lawson } 61073347b07SNate Lawson 61188c9b54cSNate Lawson /* Create a combined list of absolute + relative levels. */ 61288c9b54cSNate Lawson TAILQ_FOREACH(set_arr, &rel_sets, link) 61388c9b54cSNate Lawson cpufreq_expand_set(sc, set_arr); 61488c9b54cSNate Lawson 61588c9b54cSNate Lawson /* If the caller doesn't have enough space, return the actual count. */ 61688c9b54cSNate Lawson if (sc->all_count > *count) { 61788c9b54cSNate Lawson *count = sc->all_count; 61888c9b54cSNate Lawson error = E2BIG; 61988c9b54cSNate Lawson goto out; 62088c9b54cSNate Lawson } 62188c9b54cSNate Lawson 62288c9b54cSNate Lawson /* Finally, output the list of levels. */ 62373347b07SNate Lawson i = 0; 62473347b07SNate Lawson TAILQ_FOREACH(lev, &sc->all_levels, link) { 625e1f13773SNate Lawson /* 626e1f13773SNate Lawson * Skip levels that are too close in frequency to the 627e1f13773SNate Lawson * previous levels. Some systems report bogus duplicate 628e1f13773SNate Lawson * settings (i.e., for acpi_perf). 629e1f13773SNate Lawson */ 630e1f13773SNate Lawson if (i > 0 && CPUFREQ_CMP(lev->total_set.freq, 631e1f13773SNate Lawson levels[i - 1].total_set.freq)) { 632e1f13773SNate Lawson sc->all_count--; 633e1f13773SNate Lawson continue; 634e1f13773SNate Lawson } 635e1f13773SNate Lawson 636b070969bSNate Lawson /* Skip levels that have a frequency that is too low. */ 637da8a77c1SNate Lawson if (lev->total_set.freq < cf_lowest_freq) { 638b070969bSNate Lawson sc->all_count--; 639b070969bSNate Lawson continue; 640b070969bSNate Lawson } 641b070969bSNate Lawson 64273347b07SNate Lawson levels[i] = *lev; 64373347b07SNate Lawson i++; 64473347b07SNate Lawson } 64588c9b54cSNate Lawson *count = sc->all_count; 64673347b07SNate Lawson error = 0; 64773347b07SNate Lawson 64873347b07SNate Lawson out: 64973347b07SNate Lawson /* Clear all levels since we regenerate them each time. */ 65073347b07SNate Lawson while ((lev = TAILQ_FIRST(&sc->all_levels)) != NULL) { 65173347b07SNate Lawson TAILQ_REMOVE(&sc->all_levels, lev, link); 65273347b07SNate Lawson free(lev, M_TEMP); 65373347b07SNate Lawson } 654789f03ceSNate Lawson sc->all_count = 0; 655789f03ceSNate Lawson 656789f03ceSNate Lawson CF_MTX_UNLOCK(&sc->lock); 65788c9b54cSNate Lawson while ((set_arr = TAILQ_FIRST(&rel_sets)) != NULL) { 65888c9b54cSNate Lawson TAILQ_REMOVE(&rel_sets, set_arr, link); 65988c9b54cSNate Lawson free(set_arr, M_TEMP); 66088c9b54cSNate Lawson } 66173347b07SNate Lawson free(devs, M_TEMP); 66273347b07SNate Lawson free(sets, M_TEMP); 66373347b07SNate Lawson return (error); 66473347b07SNate Lawson } 66573347b07SNate Lawson 66673347b07SNate Lawson /* 66773347b07SNate Lawson * Create levels for an array of absolute settings and insert them in 66873347b07SNate Lawson * sorted order in the specified list. 66973347b07SNate Lawson */ 67073347b07SNate Lawson static int 67188c9b54cSNate Lawson cpufreq_insert_abs(struct cpufreq_softc *sc, struct cf_setting *sets, 67273347b07SNate Lawson int count) 67373347b07SNate Lawson { 67488c9b54cSNate Lawson struct cf_level_lst *list; 67573347b07SNate Lawson struct cf_level *level, *search; 67673347b07SNate Lawson int i; 67773347b07SNate Lawson 678789f03ceSNate Lawson CF_MTX_ASSERT(&sc->lock); 679789f03ceSNate Lawson 68088c9b54cSNate Lawson list = &sc->all_levels; 68173347b07SNate Lawson for (i = 0; i < count; i++) { 68273347b07SNate Lawson level = malloc(sizeof(*level), M_TEMP, M_NOWAIT | M_ZERO); 68373347b07SNate Lawson if (level == NULL) 68473347b07SNate Lawson return (ENOMEM); 68573347b07SNate Lawson level->abs_set = sets[i]; 68688c9b54cSNate Lawson level->total_set = sets[i]; 68788c9b54cSNate Lawson level->total_set.dev = NULL; 68888c9b54cSNate Lawson sc->all_count++; 68973347b07SNate Lawson 69073347b07SNate Lawson if (TAILQ_EMPTY(list)) { 6918d913481SNate Lawson CF_DEBUG("adding abs setting %d at head\n", 6928d913481SNate Lawson sets[i].freq); 69373347b07SNate Lawson TAILQ_INSERT_HEAD(list, level, link); 69473347b07SNate Lawson continue; 69573347b07SNate Lawson } 69673347b07SNate Lawson 69773347b07SNate Lawson TAILQ_FOREACH_REVERSE(search, list, cf_level_lst, link) { 69888c9b54cSNate Lawson if (sets[i].freq <= search->total_set.freq) { 6998d913481SNate Lawson CF_DEBUG("adding abs setting %d after %d\n", 7008d913481SNate Lawson sets[i].freq, search->total_set.freq); 70173347b07SNate Lawson TAILQ_INSERT_AFTER(list, search, level, link); 70273347b07SNate Lawson break; 70373347b07SNate Lawson } 70473347b07SNate Lawson } 70573347b07SNate Lawson } 70673347b07SNate Lawson return (0); 70773347b07SNate Lawson } 70873347b07SNate Lawson 70988c9b54cSNate Lawson /* 71088c9b54cSNate Lawson * Expand a group of relative settings, creating derived levels from them. 71188c9b54cSNate Lawson */ 71288c9b54cSNate Lawson static int 71388c9b54cSNate Lawson cpufreq_expand_set(struct cpufreq_softc *sc, struct cf_setting_array *set_arr) 71488c9b54cSNate Lawson { 71588c9b54cSNate Lawson struct cf_level *fill, *search; 71688c9b54cSNate Lawson struct cf_setting *set; 71788c9b54cSNate Lawson int i; 71888c9b54cSNate Lawson 719789f03ceSNate Lawson CF_MTX_ASSERT(&sc->lock); 720789f03ceSNate Lawson 7215308b2a6SNate Lawson /* 7225308b2a6SNate Lawson * Walk the set of all existing levels in reverse. This is so we 7235308b2a6SNate Lawson * create derived states from the lowest absolute settings first 7245308b2a6SNate Lawson * and discard duplicates created from higher absolute settings. 7255308b2a6SNate Lawson * For instance, a level of 50 Mhz derived from 100 Mhz + 50% is 7265308b2a6SNate Lawson * preferable to 200 Mhz + 25% because absolute settings are more 7275308b2a6SNate Lawson * efficient since they often change the voltage as well. 7285308b2a6SNate Lawson */ 7295308b2a6SNate Lawson TAILQ_FOREACH_REVERSE(search, &sc->all_levels, cf_level_lst, link) { 73088c9b54cSNate Lawson /* Add each setting to the level, duplicating if necessary. */ 73188c9b54cSNate Lawson for (i = 0; i < set_arr->count; i++) { 73288c9b54cSNate Lawson set = &set_arr->sets[i]; 73388c9b54cSNate Lawson 73488c9b54cSNate Lawson /* 73588c9b54cSNate Lawson * If this setting is less than 100%, split the level 73688c9b54cSNate Lawson * into two and add this setting to the new level. 73788c9b54cSNate Lawson */ 73888c9b54cSNate Lawson fill = search; 7395308b2a6SNate Lawson if (set->freq < 10000) { 74088c9b54cSNate Lawson fill = cpufreq_dup_set(sc, search, set); 74188c9b54cSNate Lawson 74288c9b54cSNate Lawson /* 7435308b2a6SNate Lawson * The new level was a duplicate of an existing 7445308b2a6SNate Lawson * level or its absolute setting is too high 7455308b2a6SNate Lawson * so we freed it. For example, we discard a 7465308b2a6SNate Lawson * derived level of 1000 MHz/25% if a level 7475308b2a6SNate Lawson * of 500 MHz/100% already exists. 74888c9b54cSNate Lawson */ 74988c9b54cSNate Lawson if (fill == NULL) 7505308b2a6SNate Lawson break; 7515308b2a6SNate Lawson } 75288c9b54cSNate Lawson 75388c9b54cSNate Lawson /* Add this setting to the existing or new level. */ 75488c9b54cSNate Lawson KASSERT(fill->rel_count < MAX_SETTINGS, 75588c9b54cSNate Lawson ("cpufreq: too many relative drivers (%d)", 75688c9b54cSNate Lawson MAX_SETTINGS)); 75788c9b54cSNate Lawson fill->rel_set[fill->rel_count] = *set; 75888c9b54cSNate Lawson fill->rel_count++; 7598d913481SNate Lawson CF_DEBUG( 7608d913481SNate Lawson "expand set added rel setting %d%% to %d level\n", 7618d913481SNate Lawson set->freq / 100, fill->total_set.freq); 76288c9b54cSNate Lawson } 76388c9b54cSNate Lawson } 76488c9b54cSNate Lawson 76588c9b54cSNate Lawson return (0); 76688c9b54cSNate Lawson } 76788c9b54cSNate Lawson 76888c9b54cSNate Lawson static struct cf_level * 76988c9b54cSNate Lawson cpufreq_dup_set(struct cpufreq_softc *sc, struct cf_level *dup, 77088c9b54cSNate Lawson struct cf_setting *set) 77188c9b54cSNate Lawson { 77288c9b54cSNate Lawson struct cf_level_lst *list; 77388c9b54cSNate Lawson struct cf_level *fill, *itr; 77488c9b54cSNate Lawson struct cf_setting *fill_set, *itr_set; 77588c9b54cSNate Lawson int i; 77688c9b54cSNate Lawson 777789f03ceSNate Lawson CF_MTX_ASSERT(&sc->lock); 778789f03ceSNate Lawson 77988c9b54cSNate Lawson /* 78088c9b54cSNate Lawson * Create a new level, copy it from the old one, and update the 78188c9b54cSNate Lawson * total frequency and power by the percentage specified in the 78288c9b54cSNate Lawson * relative setting. 78388c9b54cSNate Lawson */ 78488c9b54cSNate Lawson fill = malloc(sizeof(*fill), M_TEMP, M_NOWAIT); 78588c9b54cSNate Lawson if (fill == NULL) 78688c9b54cSNate Lawson return (NULL); 78788c9b54cSNate Lawson *fill = *dup; 78888c9b54cSNate Lawson fill_set = &fill->total_set; 78988c9b54cSNate Lawson fill_set->freq = 79088c9b54cSNate Lawson ((uint64_t)fill_set->freq * set->freq) / 10000; 79188c9b54cSNate Lawson if (fill_set->power != CPUFREQ_VAL_UNKNOWN) { 79288c9b54cSNate Lawson fill_set->power = ((uint64_t)fill_set->power * set->freq) 79388c9b54cSNate Lawson / 10000; 79488c9b54cSNate Lawson } 79588c9b54cSNate Lawson if (set->lat != CPUFREQ_VAL_UNKNOWN) { 79688c9b54cSNate Lawson if (fill_set->lat != CPUFREQ_VAL_UNKNOWN) 79788c9b54cSNate Lawson fill_set->lat += set->lat; 79888c9b54cSNate Lawson else 79988c9b54cSNate Lawson fill_set->lat = set->lat; 80088c9b54cSNate Lawson } 8018d913481SNate Lawson CF_DEBUG("dup set considering derived setting %d\n", fill_set->freq); 80288c9b54cSNate Lawson 80388c9b54cSNate Lawson /* 80488c9b54cSNate Lawson * If we copied an old level that we already modified (say, at 100%), 80588c9b54cSNate Lawson * we need to remove that setting before adding this one. Since we 80688c9b54cSNate Lawson * process each setting array in order, we know any settings for this 80788c9b54cSNate Lawson * driver will be found at the end. 80888c9b54cSNate Lawson */ 80988c9b54cSNate Lawson for (i = fill->rel_count; i != 0; i--) { 81088c9b54cSNate Lawson if (fill->rel_set[i - 1].dev != set->dev) 81188c9b54cSNate Lawson break; 8128d913481SNate Lawson CF_DEBUG("removed last relative driver: %s\n", 8138d913481SNate Lawson device_get_nameunit(set->dev)); 81488c9b54cSNate Lawson fill->rel_count--; 81588c9b54cSNate Lawson } 81688c9b54cSNate Lawson 81788c9b54cSNate Lawson /* 8185308b2a6SNate Lawson * Insert the new level in sorted order. If it is a duplicate of an 8195308b2a6SNate Lawson * existing level (1) or has an absolute setting higher than the 8205308b2a6SNate Lawson * existing level (2), do not add it. We can do this since any such 8215308b2a6SNate Lawson * level is guaranteed use less power. For example (1), a level with 8225308b2a6SNate Lawson * one absolute setting of 800 Mhz uses less power than one composed 8235308b2a6SNate Lawson * of an absolute setting of 1600 Mhz and a relative setting at 50%. 8245308b2a6SNate Lawson * Also for example (2), a level of 800 Mhz/75% is preferable to 8255308b2a6SNate Lawson * 1600 Mhz/25% even though the latter has a lower total frequency. 82688c9b54cSNate Lawson */ 82788c9b54cSNate Lawson list = &sc->all_levels; 8285308b2a6SNate Lawson KASSERT(!TAILQ_EMPTY(list), ("all levels list empty in dup set")); 82988c9b54cSNate Lawson TAILQ_FOREACH_REVERSE(itr, list, cf_level_lst, link) { 83088c9b54cSNate Lawson itr_set = &itr->total_set; 8319000b91eSNate Lawson if (CPUFREQ_CMP(fill_set->freq, itr_set->freq)) { 8329000b91eSNate Lawson CF_DEBUG("dup set rejecting %d (dupe)\n", 8339000b91eSNate Lawson fill_set->freq); 8349000b91eSNate Lawson itr = NULL; 8359000b91eSNate Lawson break; 8369000b91eSNate Lawson } else if (fill_set->freq < itr_set->freq) { 8379000b91eSNate Lawson if (fill->abs_set.freq <= itr->abs_set.freq) { 8388d913481SNate Lawson CF_DEBUG( 8398d913481SNate Lawson "dup done, inserting new level %d after %d\n", 8408d913481SNate Lawson fill_set->freq, itr_set->freq); 84188c9b54cSNate Lawson TAILQ_INSERT_AFTER(list, itr, fill, link); 84288c9b54cSNate Lawson sc->all_count++; 8439000b91eSNate Lawson } else { 8449000b91eSNate Lawson CF_DEBUG("dup set rejecting %d (abs too big)\n", 8459000b91eSNate Lawson fill_set->freq); 8469000b91eSNate Lawson itr = NULL; 8479000b91eSNate Lawson } 84888c9b54cSNate Lawson break; 84988c9b54cSNate Lawson } 85088c9b54cSNate Lawson } 8515308b2a6SNate Lawson 8525308b2a6SNate Lawson /* We didn't find a good place for this new level so free it. */ 8535308b2a6SNate Lawson if (itr == NULL) { 8545308b2a6SNate Lawson CF_DEBUG("dup set freeing new level %d (not optimal)\n", 8555308b2a6SNate Lawson fill_set->freq); 8565308b2a6SNate Lawson free(fill, M_TEMP); 8575308b2a6SNate Lawson fill = NULL; 85888c9b54cSNate Lawson } 85988c9b54cSNate Lawson 86088c9b54cSNate Lawson return (fill); 86188c9b54cSNate Lawson } 86288c9b54cSNate Lawson 86373347b07SNate Lawson static int 86473347b07SNate Lawson cpufreq_curr_sysctl(SYSCTL_HANDLER_ARGS) 86573347b07SNate Lawson { 86673347b07SNate Lawson struct cpufreq_softc *sc; 86773347b07SNate Lawson struct cf_level *levels; 8680325089dSNate Lawson int count, devcount, error, freq, i, n; 8690325089dSNate Lawson device_t *devs; 87073347b07SNate Lawson 8710325089dSNate Lawson devs = NULL; 87273347b07SNate Lawson sc = oidp->oid_arg1; 8730325089dSNate Lawson levels = malloc(CF_MAX_LEVELS * sizeof(*levels), M_TEMP, M_NOWAIT); 87473347b07SNate Lawson if (levels == NULL) 87573347b07SNate Lawson return (ENOMEM); 87673347b07SNate Lawson 87773347b07SNate Lawson error = CPUFREQ_GET(sc->dev, &levels[0]); 87873347b07SNate Lawson if (error) 87973347b07SNate Lawson goto out; 88073347b07SNate Lawson freq = levels[0].total_set.freq; 88173347b07SNate Lawson error = sysctl_handle_int(oidp, &freq, 0, req); 88273347b07SNate Lawson if (error != 0 || req->newptr == NULL) 88373347b07SNate Lawson goto out; 88473347b07SNate Lawson 8850325089dSNate Lawson /* 8860325089dSNate Lawson * While we only call cpufreq_get() on one device (assuming all 8870325089dSNate Lawson * CPUs have equal levels), we call cpufreq_set() on all CPUs. 8880325089dSNate Lawson * This is needed for some MP systems. 8890325089dSNate Lawson */ 8900325089dSNate Lawson error = devclass_get_devices(cpufreq_dc, &devs, &devcount); 89173347b07SNate Lawson if (error) 89273347b07SNate Lawson goto out; 8930325089dSNate Lawson for (n = 0; n < devcount; n++) { 8940325089dSNate Lawson count = CF_MAX_LEVELS; 8950325089dSNate Lawson error = CPUFREQ_LEVELS(devs[n], levels, &count); 896d269386aSNate Lawson if (error) { 897d269386aSNate Lawson if (error == E2BIG) 898d269386aSNate Lawson printf( 899d269386aSNate Lawson "cpufreq: need to increase CF_MAX_LEVELS\n"); 9000325089dSNate Lawson break; 901d269386aSNate Lawson } 90273347b07SNate Lawson for (i = 0; i < count; i++) { 90373347b07SNate Lawson if (CPUFREQ_CMP(levels[i].total_set.freq, freq)) { 9040325089dSNate Lawson error = CPUFREQ_SET(devs[n], &levels[i], 90573347b07SNate Lawson CPUFREQ_PRIO_USER); 90673347b07SNate Lawson break; 90773347b07SNate Lawson } 90873347b07SNate Lawson } 9090325089dSNate Lawson if (i == count) { 91073347b07SNate Lawson error = EINVAL; 9110325089dSNate Lawson break; 9120325089dSNate Lawson } 9130325089dSNate Lawson } 91473347b07SNate Lawson 91573347b07SNate Lawson out: 9160325089dSNate Lawson if (devs) 9170325089dSNate Lawson free(devs, M_TEMP); 91873347b07SNate Lawson if (levels) 91973347b07SNate Lawson free(levels, M_TEMP); 92073347b07SNate Lawson return (error); 92173347b07SNate Lawson } 92273347b07SNate Lawson 92373347b07SNate Lawson static int 92473347b07SNate Lawson cpufreq_levels_sysctl(SYSCTL_HANDLER_ARGS) 92573347b07SNate Lawson { 92673347b07SNate Lawson struct cpufreq_softc *sc; 92773347b07SNate Lawson struct cf_level *levels; 92873347b07SNate Lawson struct cf_setting *set; 92973347b07SNate Lawson struct sbuf sb; 93073347b07SNate Lawson int count, error, i; 93173347b07SNate Lawson 93273347b07SNate Lawson sc = oidp->oid_arg1; 93373347b07SNate Lawson sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND); 93473347b07SNate Lawson 93573347b07SNate Lawson /* Get settings from the device and generate the output string. */ 93673347b07SNate Lawson count = CF_MAX_LEVELS; 93773347b07SNate Lawson levels = malloc(count * sizeof(*levels), M_TEMP, M_NOWAIT); 93830215f48SChristian Brueffer if (levels == NULL) { 93930215f48SChristian Brueffer sbuf_delete(&sb); 94073347b07SNate Lawson return (ENOMEM); 94130215f48SChristian Brueffer } 94273347b07SNate Lawson error = CPUFREQ_LEVELS(sc->dev, levels, &count); 943d269386aSNate Lawson if (error) { 944d269386aSNate Lawson if (error == E2BIG) 945d269386aSNate Lawson printf("cpufreq: need to increase CF_MAX_LEVELS\n"); 94673347b07SNate Lawson goto out; 947d269386aSNate Lawson } 94873347b07SNate Lawson if (count) { 94973347b07SNate Lawson for (i = 0; i < count; i++) { 95073347b07SNate Lawson set = &levels[i].total_set; 95173347b07SNate Lawson sbuf_printf(&sb, "%d/%d ", set->freq, set->power); 95273347b07SNate Lawson } 95373347b07SNate Lawson } else 95473347b07SNate Lawson sbuf_cpy(&sb, "0"); 95573347b07SNate Lawson sbuf_trim(&sb); 95673347b07SNate Lawson sbuf_finish(&sb); 95773347b07SNate Lawson error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 95873347b07SNate Lawson 95973347b07SNate Lawson out: 96073347b07SNate Lawson free(levels, M_TEMP); 96173347b07SNate Lawson sbuf_delete(&sb); 96273347b07SNate Lawson return (error); 96373347b07SNate Lawson } 96473347b07SNate Lawson 965e959a70bSNate Lawson static int 966e959a70bSNate Lawson cpufreq_settings_sysctl(SYSCTL_HANDLER_ARGS) 967e959a70bSNate Lawson { 968e959a70bSNate Lawson device_t dev; 969e959a70bSNate Lawson struct cf_setting *sets; 970e959a70bSNate Lawson struct sbuf sb; 971e959a70bSNate Lawson int error, i, set_count; 972e959a70bSNate Lawson 973e959a70bSNate Lawson dev = oidp->oid_arg1; 974e959a70bSNate Lawson sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND); 975e959a70bSNate Lawson 976e959a70bSNate Lawson /* Get settings from the device and generate the output string. */ 977e959a70bSNate Lawson set_count = MAX_SETTINGS; 978e959a70bSNate Lawson sets = malloc(set_count * sizeof(*sets), M_TEMP, M_NOWAIT); 97930215f48SChristian Brueffer if (sets == NULL) { 98030215f48SChristian Brueffer sbuf_delete(&sb); 981e959a70bSNate Lawson return (ENOMEM); 98230215f48SChristian Brueffer } 983e959a70bSNate Lawson error = CPUFREQ_DRV_SETTINGS(dev, sets, &set_count); 984e959a70bSNate Lawson if (error) 985e959a70bSNate Lawson goto out; 986e959a70bSNate Lawson if (set_count) { 987e959a70bSNate Lawson for (i = 0; i < set_count; i++) 988e959a70bSNate Lawson sbuf_printf(&sb, "%d/%d ", sets[i].freq, sets[i].power); 989e959a70bSNate Lawson } else 990e959a70bSNate Lawson sbuf_cpy(&sb, "0"); 991e959a70bSNate Lawson sbuf_trim(&sb); 992e959a70bSNate Lawson sbuf_finish(&sb); 993e959a70bSNate Lawson error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 994e959a70bSNate Lawson 995e959a70bSNate Lawson out: 996e959a70bSNate Lawson free(sets, M_TEMP); 997e959a70bSNate Lawson sbuf_delete(&sb); 998e959a70bSNate Lawson return (error); 999e959a70bSNate Lawson } 1000e959a70bSNate Lawson 100173347b07SNate Lawson int 100273347b07SNate Lawson cpufreq_register(device_t dev) 100373347b07SNate Lawson { 100467c8649fSNate Lawson struct cpufreq_softc *sc; 100573347b07SNate Lawson device_t cf_dev, cpu_dev; 100673347b07SNate Lawson 1007e959a70bSNate Lawson /* Add a sysctl to get each driver's settings separately. */ 1008e959a70bSNate Lawson SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1009e959a70bSNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 1010e959a70bSNate Lawson OID_AUTO, "freq_settings", CTLTYPE_STRING | CTLFLAG_RD, dev, 0, 1011e959a70bSNate Lawson cpufreq_settings_sysctl, "A", "CPU frequency driver settings"); 1012e959a70bSNate Lawson 101373347b07SNate Lawson /* 10140325089dSNate Lawson * Add only one cpufreq device to each CPU. Currently, all CPUs 10150325089dSNate Lawson * must offer the same levels and be switched at the same time. 101673347b07SNate Lawson */ 10170325089dSNate Lawson cpu_dev = device_get_parent(dev); 101867c8649fSNate Lawson if ((cf_dev = device_find_child(cpu_dev, "cpufreq", -1))) { 101967c8649fSNate Lawson sc = device_get_softc(cf_dev); 102067c8649fSNate Lawson sc->max_mhz = CPUFREQ_VAL_UNKNOWN; 102173347b07SNate Lawson return (0); 102267c8649fSNate Lawson } 102373347b07SNate Lawson 10240325089dSNate Lawson /* Add the child device and possibly sysctls. */ 10250325089dSNate Lawson cf_dev = BUS_ADD_CHILD(cpu_dev, 0, "cpufreq", -1); 102673347b07SNate Lawson if (cf_dev == NULL) 102773347b07SNate Lawson return (ENOMEM); 102873347b07SNate Lawson device_quiet(cf_dev); 102973347b07SNate Lawson 103073347b07SNate Lawson return (device_probe_and_attach(cf_dev)); 103173347b07SNate Lawson } 103273347b07SNate Lawson 103373347b07SNate Lawson int 103473347b07SNate Lawson cpufreq_unregister(device_t dev) 103573347b07SNate Lawson { 103673347b07SNate Lawson device_t cf_dev, *devs; 1037e94a0c1aSNate Lawson int cfcount, devcount, error, i, type; 103873347b07SNate Lawson 103973347b07SNate Lawson /* 104073347b07SNate Lawson * If this is the last cpufreq child device, remove the control 104173347b07SNate Lawson * device as well. We identify cpufreq children by calling a method 104273347b07SNate Lawson * they support. 104373347b07SNate Lawson */ 104473347b07SNate Lawson error = device_get_children(device_get_parent(dev), &devs, &devcount); 104573347b07SNate Lawson if (error) 104673347b07SNate Lawson return (error); 104767c8649fSNate Lawson cf_dev = device_find_child(device_get_parent(dev), "cpufreq", -1); 104871ab130cSNate Lawson if (cf_dev == NULL) { 104971ab130cSNate Lawson device_printf(dev, 105071ab130cSNate Lawson "warning: cpufreq_unregister called with no cpufreq device active\n"); 105171ab130cSNate Lawson return (0); 105271ab130cSNate Lawson } 105373347b07SNate Lawson cfcount = 0; 105473347b07SNate Lawson for (i = 0; i < devcount; i++) { 105573347b07SNate Lawson if (!device_is_attached(devs[i])) 105673347b07SNate Lawson continue; 1057e94a0c1aSNate Lawson if (CPUFREQ_DRV_TYPE(devs[i], &type) == 0) 105873347b07SNate Lawson cfcount++; 105973347b07SNate Lawson } 10600325089dSNate Lawson if (cfcount <= 1) 106173347b07SNate Lawson device_delete_child(device_get_parent(cf_dev), cf_dev); 106273347b07SNate Lawson free(devs, M_TEMP); 106373347b07SNate Lawson 106473347b07SNate Lawson return (0); 106573347b07SNate Lawson } 10660d4ac62aSNate Lawson 10670d4ac62aSNate Lawson int 10680d4ac62aSNate Lawson cpufreq_settings_changed(device_t dev) 10690d4ac62aSNate Lawson { 10700d4ac62aSNate Lawson 10710d4ac62aSNate Lawson EVENTHANDLER_INVOKE(cpufreq_levels_changed, 10720d4ac62aSNate Lawson device_get_unit(device_get_parent(dev))); 10730d4ac62aSNate Lawson return (0); 10740d4ac62aSNate Lawson } 1075