diff options
Diffstat (limited to 'drivers')
26 files changed, 327 insertions, 161 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 33c30c1e6a30..b063bc41b0a9 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -1536,7 +1536,8 @@ static int genpd_add_device(struct generic_pm_domain *genpd, struct device *dev, if (ret) genpd_free_dev_data(dev, gpd_data); else - dev_pm_qos_add_notifier(dev, &gpd_data->nb); + dev_pm_qos_add_notifier(dev, &gpd_data->nb, + DEV_PM_QOS_RESUME_LATENCY); return ret; } @@ -1569,7 +1570,8 @@ static int genpd_remove_device(struct generic_pm_domain *genpd, pdd = dev->power.subsys_data->domain_data; gpd_data = to_gpd_data(pdd); - dev_pm_qos_remove_notifier(dev, &gpd_data->nb); + dev_pm_qos_remove_notifier(dev, &gpd_data->nb, + DEV_PM_QOS_RESUME_LATENCY); genpd_lock(genpd); @@ -1597,7 +1599,7 @@ static int genpd_remove_device(struct generic_pm_domain *genpd, out: genpd_unlock(genpd); - dev_pm_qos_add_notifier(dev, &gpd_data->nb); + dev_pm_qos_add_notifier(dev, &gpd_data->nb, DEV_PM_QOS_RESUME_LATENCY); return ret; } diff --git a/drivers/base/power/domain_governor.c b/drivers/base/power/domain_governor.c index 3838045c9277..daa8c7689f7e 100644 --- a/drivers/base/power/domain_governor.c +++ b/drivers/base/power/domain_governor.c @@ -33,7 +33,7 @@ static int dev_update_qos_constraint(struct device *dev, void *data) * take its current PM QoS constraint (that's the only thing * known at this point anyway). */ - constraint_ns = dev_pm_qos_read_value(dev); + constraint_ns = dev_pm_qos_read_value(dev, DEV_PM_QOS_RESUME_LATENCY); constraint_ns *= NSEC_PER_USEC; } @@ -66,7 +66,7 @@ static bool default_suspend_ok(struct device *dev) td->constraint_changed = false; td->cached_suspend_ok = false; td->effective_constraint_ns = 0; - constraint_ns = __dev_pm_qos_read_value(dev); + constraint_ns = __dev_pm_qos_resume_latency(dev); spin_unlock_irqrestore(&dev->power.lock, flags); diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c index 6c91f8df1d59..6c90fd7e2ff8 100644 --- a/drivers/base/power/qos.c +++ b/drivers/base/power/qos.c @@ -90,29 +90,49 @@ enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask) EXPORT_SYMBOL_GPL(dev_pm_qos_flags); /** - * __dev_pm_qos_read_value - Get PM QoS constraint for a given device. + * __dev_pm_qos_resume_latency - Get resume latency constraint for a given device. * @dev: Device to get the PM QoS constraint value for. * * This routine must be called with dev->power.lock held. */ -s32 __dev_pm_qos_read_value(struct device *dev) +s32 __dev_pm_qos_resume_latency(struct device *dev) { lockdep_assert_held(&dev->power.lock); - return dev_pm_qos_raw_read_value(dev); + return dev_pm_qos_raw_resume_latency(dev); } /** * dev_pm_qos_read_value - Get PM QoS constraint for a given device (locked). * @dev: Device to get the PM QoS constraint value for. + * @type: QoS request type. */ -s32 dev_pm_qos_read_value(struct device *dev) +s32 dev_pm_qos_read_value(struct device *dev, enum dev_pm_qos_req_type type) { + struct dev_pm_qos *qos = dev->power.qos; unsigned long flags; s32 ret; spin_lock_irqsave(&dev->power.lock, flags); - ret = __dev_pm_qos_read_value(dev); + + switch (type) { + case DEV_PM_QOS_RESUME_LATENCY: + ret = IS_ERR_OR_NULL(qos) ? PM_QOS_RESUME_LATENCY_NO_CONSTRAINT + : pm_qos_read_value(&qos->resume_latency); + break; + case DEV_PM_QOS_MIN_FREQUENCY: + ret = IS_ERR_OR_NULL(qos) ? PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE + : pm_qos_read_value(&qos->min_frequency); + break; + case DEV_PM_QOS_MAX_FREQUENCY: + ret = IS_ERR_OR_NULL(qos) ? PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE + : pm_qos_read_value(&qos->max_frequency); + break; + default: + WARN_ON(1); + ret = 0; + } + spin_unlock_irqrestore(&dev->power.lock, flags); return ret; @@ -149,6 +169,14 @@ static int apply_constraint(struct dev_pm_qos_request *req, req->dev->power.set_latency_tolerance(req->dev, value); } break; + case DEV_PM_QOS_MIN_FREQUENCY: + ret = pm_qos_update_target(&qos->min_frequency, + &req->data.pnode, action, value); + break; + case DEV_PM_QOS_MAX_FREQUENCY: + ret = pm_qos_update_target(&qos->max_frequency, + &req->data.pnode, action, value); + break; case DEV_PM_QOS_FLAGS: ret = pm_qos_update_flags(&qos->flags, &req->data.flr, action, value); @@ -177,12 +205,11 @@ static int dev_pm_qos_constraints_allocate(struct device *dev) if (!qos) return -ENOMEM; - n = kzalloc(sizeof(*n), GFP_KERNEL); + n = kzalloc(3 * sizeof(*n), GFP_KERNEL); if (!n) { kfree(qos); return -ENOMEM; } - BLOCKING_INIT_NOTIFIER_HEAD(n); c = &qos->resume_latency; plist_head_init(&c->list); @@ -191,6 +218,7 @@ static int dev_pm_qos_constraints_allocate(struct device *dev) c->no_constraint_value = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; c->type = PM_QOS_MIN; c->notifiers = n; + BLOCKING_INIT_NOTIFIER_HEAD(n); c = &qos->latency_tolerance; plist_head_init(&c->list); @@ -199,6 +227,24 @@ static int dev_pm_qos_constraints_allocate(struct device *dev) c->no_constraint_value = PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; c->type = PM_QOS_MIN; + c = &qos->min_frequency; + plist_head_init(&c->list); + c->target_value = PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE; + c->default_value = PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE; + c->no_constraint_value = PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE; + c->type = PM_QOS_MAX; + c->notifiers = ++n; + BLOCKING_INIT_NOTIFIER_HEAD(n); + + c = &qos->max_frequency; + plist_head_init(&c->list); + c->target_value = PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE; + c->default_value = PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE; + c->no_constraint_value = PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE; + c->type = PM_QOS_MIN; + c->notifiers = ++n; + BLOCKING_INIT_NOTIFIER_HEAD(n); + INIT_LIST_HEAD(&qos->flags.list); spin_lock_irq(&dev->power.lock); @@ -252,11 +298,25 @@ void dev_pm_qos_constraints_destroy(struct device *dev) apply_constraint(req, PM_QOS_REMOVE_REQ, PM_QOS_DEFAULT_VALUE); memset(req, 0, sizeof(*req)); } + c = &qos->latency_tolerance; plist_for_each_entry_safe(req, tmp, &c->list, data.pnode) { apply_constraint(req, PM_QOS_REMOVE_REQ, PM_QOS_DEFAULT_VALUE); memset(req, 0, sizeof(*req)); } + + c = &qos->min_frequency; + plist_for_each_entry_safe(req, tmp, &c->list, data.pnode) { + apply_constraint(req, PM_QOS_REMOVE_REQ, PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE); + memset(req, 0, sizeof(*req)); + } + + c = &qos->max_frequency; + plist_for_each_entry_safe(req, tmp, &c->list, data.pnode) { + apply_constraint(req, PM_QOS_REMOVE_REQ, PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE); + memset(req, 0, sizeof(*req)); + } + f = &qos->flags; list_for_each_entry_safe(req, tmp, &f->list, data.flr.node) { apply_constraint(req, PM_QOS_REMOVE_REQ, PM_QOS_DEFAULT_VALUE); @@ -368,6 +428,8 @@ static int __dev_pm_qos_update_request(struct dev_pm_qos_request *req, switch(req->type) { case DEV_PM_QOS_RESUME_LATENCY: case DEV_PM_QOS_LATENCY_TOLERANCE: + case DEV_PM_QOS_MIN_FREQUENCY: + case DEV_PM_QOS_MAX_FREQUENCY: curr_value = req->data.pnode.prio; break; case DEV_PM_QOS_FLAGS: @@ -467,6 +529,7 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_remove_request); * * @dev: target device for the constraint * @notifier: notifier block managed by caller. + * @type: request type. * * Will register the notifier into a notification chain that gets called * upon changes to the target value for the device. @@ -474,7 +537,8 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_remove_request); * If the device's constraints object doesn't exist when this routine is called, * it will be created (or error code will be returned if that fails). */ -int dev_pm_qos_add_notifier(struct device *dev, struct notifier_block *notifier) +int dev_pm_qos_add_notifier(struct device *dev, struct notifier_block *notifier, + enum dev_pm_qos_req_type type) { int ret = 0; @@ -485,10 +549,28 @@ int dev_pm_qos_add_notifier(struct device *dev, struct notifier_block *notifier) else if (!dev->power.qos) ret = dev_pm_qos_constraints_allocate(dev); - if (!ret) + if (ret) + goto unlock; + + switch (type) { + case DEV_PM_QOS_RESUME_LATENCY: ret = blocking_notifier_chain_register(dev->power.qos->resume_latency.notifiers, notifier); + break; + case DEV_PM_QOS_MIN_FREQUENCY: + ret = blocking_notifier_chain_register(dev->power.qos->min_frequency.notifiers, + notifier); + break; + case DEV_PM_QOS_MAX_FREQUENCY: + ret = blocking_notifier_chain_register(dev->power.qos->max_frequency.notifiers, + notifier); + break; + default: + WARN_ON(1); + ret = -EINVAL; + } +unlock: mutex_unlock(&dev_pm_qos_mtx); return ret; } @@ -500,24 +582,44 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_add_notifier); * * @dev: target device for the constraint * @notifier: notifier block to be removed. + * @type: request type. * * Will remove the notifier from the notification chain that gets called * upon changes to the target value. */ int dev_pm_qos_remove_notifier(struct device *dev, - struct notifier_block *notifier) + struct notifier_block *notifier, + enum dev_pm_qos_req_type type) { - int retval = 0; + int ret = 0; mutex_lock(&dev_pm_qos_mtx); /* Silently return if the constraints object is not present. */ - if (!IS_ERR_OR_NULL(dev->power.qos)) - retval = blocking_notifier_chain_unregister(dev->power.qos->resume_latency.notifiers, - notifier); + if (IS_ERR_OR_NULL(dev->power.qos)) + goto unlock; + + switch (type) { + case DEV_PM_QOS_RESUME_LATENCY: + ret = blocking_notifier_chain_unregister(dev->power.qos->resume_latency.notifiers, + notifier); + break; + case DEV_PM_QOS_MIN_FREQUENCY: + ret = blocking_notifier_chain_unregister(dev->power.qos->min_frequency.notifiers, + notifier); + break; + case DEV_PM_QOS_MAX_FREQUENCY: + ret = blocking_notifier_chain_unregister(dev->power.qos->max_frequency.notifiers, + notifier); + break; + default: + WARN_ON(1); + ret = -EINVAL; + } +unlock: mutex_unlock(&dev_pm_qos_mtx); - return retval; + return ret; } EXPORT_SYMBOL_GPL(dev_pm_qos_remove_notifier); @@ -577,6 +679,9 @@ static void __dev_pm_qos_drop_user_request(struct device *dev, req = dev->power.qos->flags_req; dev->power.qos->flags_req = NULL; break; + default: + WARN_ON(1); + return; } __dev_pm_qos_remove_request(req); kfree(req); diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index 952a1e7057c7..b75335508d2c 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -275,7 +275,7 @@ static int rpm_check_suspend_allowed(struct device *dev) || (dev->power.request_pending && dev->power.request == RPM_REQ_RESUME)) retval = -EAGAIN; - else if (__dev_pm_qos_read_value(dev) == 0) + else if (__dev_pm_qos_resume_latency(dev) == 0) retval = -EPERM; else if (dev->power.runtime_status == RPM_SUSPENDED) retval = 1; diff --git a/drivers/cpufreq/bmips-cpufreq.c b/drivers/cpufreq/bmips-cpufreq.c index 56a4ebbf00e0..f7c23fa468f0 100644 --- a/drivers/cpufreq/bmips-cpufreq.c +++ b/drivers/cpufreq/bmips-cpufreq.c @@ -131,23 +131,18 @@ static int bmips_cpufreq_exit(struct cpufreq_policy *policy) static int bmips_cpufreq_init(struct cpufreq_policy *policy) { struct cpufreq_frequency_table *freq_table; - int ret; freq_table = bmips_cpufreq_get_freq_table(policy); if (IS_ERR(freq_table)) { - ret = PTR_ERR(freq_table); - pr_err("%s: couldn't determine frequency table (%d).\n", - BMIPS_CPUFREQ_NAME, ret); - return ret; + pr_err("%s: couldn't determine frequency table (%ld).\n", + BMIPS_CPUFREQ_NAME, PTR_ERR(freq_table)); + return PTR_ERR(freq_table); } - ret = cpufreq_generic_init(policy, freq_table, TRANSITION_LATENCY); - if (ret) - bmips_cpufreq_exit(policy); - else - pr_info("%s: registered\n", BMIPS_CPUFREQ_NAME); + cpufreq_generic_init(policy, freq_table, TRANSITION_LATENCY); + pr_info("%s: registered\n", BMIPS_CPUFREQ_NAME); - return ret; + return 0; } static struct cpufreq_driver bmips_cpufreq_driver = { diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 0a9f675f2af4..8dda62367816 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -23,6 +23,7 @@ #include <linux/kernel_stat.h> #include <linux/module.h> #include <linux/mutex.h> +#include <linux/pm_qos.h> #include <linux/slab.h> #include <linux/suspend.h> #include <linux/syscore_ops.h> @@ -158,7 +159,7 @@ EXPORT_SYMBOL_GPL(arch_set_freq_scale); * - set policies transition latency * - policy->cpus with all possible CPUs */ -int cpufreq_generic_init(struct cpufreq_policy *policy, +void cpufreq_generic_init(struct cpufreq_policy *policy, struct cpufreq_frequency_table *table, unsigned int transition_latency) { @@ -170,8 +171,6 @@ int cpufreq_generic_init(struct cpufreq_policy *policy, * share the clock and voltage and clock. */ cpumask_setall(policy->cpus); - - return 0; } EXPORT_SYMBOL_GPL(cpufreq_generic_init); @@ -714,23 +713,15 @@ static ssize_t show_scaling_cur_freq(struct cpufreq_policy *policy, char *buf) static ssize_t store_##file_name \ (struct cpufreq_policy *policy, const char *buf, size_t count) \ { \ - int ret, temp; \ - struct cpufreq_policy new_policy; \ + unsigned long val; \ + int ret; \ \ - memcpy(&new_policy, policy, sizeof(*policy)); \ - new_policy.min = policy->user_policy.min; \ - new_policy.max = policy->user_policy.max; \ - \ - ret = sscanf(buf, "%u", &new_policy.object); \ + ret = sscanf(buf, "%lu", &val); \ if (ret != 1) \ return -EINVAL; \ \ - temp = new_policy.object; \ - ret = cpufreq_set_policy(policy, &new_policy); \ - if (!ret) \ - policy->user_policy.object = temp; \ - \ - return ret ? ret : count; \ + ret = dev_pm_qos_update_request(policy->object##_freq_req, val);\ + return ret >= 0 ? count : ret; \ } store_one(scaling_min_freq, min); @@ -996,7 +987,7 @@ static void add_cpu_dev_symlink(struct cpufreq_policy *policy, unsigned int cpu) { struct device *dev = get_cpu_device(cpu); - if (!dev) + if (unlikely(!dev)) return; if (cpumask_test_and_set_cpu(cpu, policy->real_cpus)) @@ -1112,17 +1103,18 @@ static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy, unsigned int cp return ret; } -static void refresh_frequency_limits(struct cpufreq_policy *policy) +void refresh_frequency_limits(struct cpufreq_policy *policy) { - struct cpufreq_policy new_policy = *policy; - - pr_debug("updating policy for CPU %u\n", policy->cpu); + struct cpufreq_policy new_policy; - new_policy.min = policy->user_policy.min; - new_policy.max = policy->user_policy.max; + if (!policy_is_inactive(policy)) { + new_policy = *policy; + pr_debug("updating policy for CPU %u\n", policy->cpu); - cpufreq_set_policy(policy, &new_policy); + cpufreq_set_policy(policy, &new_policy); + } } +EXPORT_SYMBOL(refresh_frequency_limits); static void handle_update(struct work_struct *work) { @@ -1130,14 +1122,60 @@ static void handle_update(struct work_struct *work) container_of(work, struct cpufreq_policy, update); pr_debug("handle_update for cpu %u called\n", policy->cpu); + down_write(&policy->rwsem); refresh_frequency_limits(policy); + up_write(&policy->rwsem); +} + +static int cpufreq_notifier_min(struct notifier_block *nb, unsigned long freq, + void *data) +{ + struct cpufreq_policy *policy = container_of(nb, struct cpufreq_policy, nb_min); + + schedule_work(&policy->update); + return 0; +} + +static int cpufreq_notifier_max(struct notifier_block *nb, unsigned long freq, + void *data) +{ + struct cpufreq_policy *policy = container_of(nb, struct cpufreq_policy, nb_max); + + schedule_work(&policy->update); + return 0; +} + +static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy) +{ + struct kobject *kobj; + struct completion *cmp; + + down_write(&policy->rwsem); + cpufreq_stats_free_table(policy); + kobj = &policy->kobj; + cmp = &policy->kobj_unregister; + up_write(&policy->rwsem); + kobject_put(kobj); + + /* + * We need to make sure that the underlying kobj is + * actually not referenced anymore by anybody before we + * proceed with unloading. + */ + pr_debug("waiting for dropping of refcount\n"); + wait_for_completion(cmp); + pr_debug("wait complete\n"); } static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu) { struct cpufreq_policy *policy; + struct device *dev = get_cpu_device(cpu); int ret; + if (!dev) + return NULL; + policy = kzalloc(sizeof(*policy), GFP_KERNEL); if (!policy) return NULL; @@ -1154,7 +1192,7 @@ static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu) ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq, cpufreq_global_kobject, "policy%u", cpu); if (ret) { - pr_err("%s: failed to init policy->kobj: %d\n", __func__, ret); + dev_err(dev, "%s: failed to init policy->kobj: %d\n", __func__, ret); /* * The entire policy object will be freed below, but the extra * memory allocated for the kobject name needs to be freed by @@ -1164,6 +1202,25 @@ static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu) goto err_free_real_cpus; } + policy->nb_min.notifier_call = cpufreq_notifier_min; + policy->nb_max.notifier_call = cpufreq_notifier_max; + + ret = dev_pm_qos_add_notifier(dev, &policy->nb_min, + DEV_PM_QOS_MIN_FREQUENCY); + if (ret) { + dev_err(dev, "Failed to register MIN QoS notifier: %d (%*pbl)\n", + ret, cpumask_pr_args(policy->cpus)); + goto err_kobj_remove; + } + + ret = dev_pm_qos_add_notifier(dev, &policy->nb_max, + DEV_PM_QOS_MAX_FREQUENCY); + if (ret) { + dev_err(dev, "Failed to register MAX QoS notifier: %d (%*pbl)\n", + ret, cpumask_pr_args(policy->cpus)); + goto err_min_qos_notifier; + } + INIT_LIST_HEAD(&policy->policy_list); init_rwsem(&policy->rwsem); spin_lock_init(&policy->transition_lock); @@ -1174,6 +1231,11 @@ static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu) policy->cpu = cpu; return policy; +err_min_qos_notifier: + dev_pm_qos_remove_notifier(dev, &policy->nb_min, + DEV_PM_QOS_MIN_FREQUENCY); +err_kobj_remove: + cpufreq_policy_put_kobj(policy); err_free_real_cpus: free_cpumask_var(policy->real_cpus); err_free_rcpumask: @@ -1186,30 +1248,9 @@ err_free_policy: return NULL; } -static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy) -{ - struct kobject *kobj; - struct completion *cmp; - - down_write(&policy->rwsem); - cpufreq_stats_free_table(policy); - kobj = &policy->kobj; - cmp = &policy->kobj_unregister; - up_write(&policy->rwsem); - kobject_put(kobj); - - /* - * We need to make sure that the underlying kobj is - * actually not referenced anymore by anybody before we - * proceed with unloading. - */ - pr_debug("waiting for dropping of refcount\n"); - wait_for_completion(cmp); - pr_debug("wait complete\n"); -} - static void cpufreq_policy_free(struct cpufreq_policy *policy) { + struct device *dev = get_cpu_device(policy->cpu); unsigned long flags; int cpu; @@ -1221,6 +1262,14 @@ static void cpufreq_policy_free(struct cpufreq_policy *policy) per_cpu(cpufreq_cpu_data, cpu) = NULL; write_unlock_irqrestore(&cpufreq_driver_lock, flags); + dev_pm_qos_remove_notifier(dev, &policy->nb_max, + DEV_PM_QOS_MAX_FREQUENCY); + dev_pm_qos_remove_notifier(dev, &policy->nb_min, + DEV_PM_QOS_MIN_FREQUENCY); + dev_pm_qos_remove_request(policy->max_freq_req); + dev_pm_qos_remove_request(policy->min_freq_req); + kfree(policy->min_freq_req); + cpufreq_policy_put_kobj(policy); free_cpumask_var(policy->real_cpus); free_cpumask_var(policy->related_cpus); @@ -1298,16 +1347,50 @@ static int cpufreq_online(unsigned int cpu) cpumask_and(policy->cpus, policy->cpus, cpu_online_mask); if (new_policy) { - policy->user_policy.min = policy->min; - policy->user_policy.max = policy->max; + struct device *dev = get_cpu_device(cpu); for_each_cpu(j, policy->related_cpus) { per_cpu(cpufreq_cpu_data, j) = policy; add_cpu_dev_symlink(policy, j); } - } else { - policy->min = policy->user_policy.min; - policy->max = policy->user_policy.max; + + policy->min_freq_req = kzalloc(2 * sizeof(*policy->min_freq_req), + GFP_KERNEL); + if (!policy->min_freq_req) + goto out_destroy_policy; + + ret = dev_pm_qos_add_request(dev, policy->min_freq_req, + DEV_PM_QOS_MIN_FREQUENCY, + policy->min); + if (ret < 0) { + /* + * So we don't call dev_pm_qos_remove_request() for an + * uninitialized request. + */ + kfree(policy->min_freq_req); + policy->min_freq_req = NULL; + + dev_err(dev, "Failed to add min-freq constraint (%d)\n", + ret); + goto out_destroy_policy; + } + + /* + * This must be initialized right here to avoid calling + * dev_pm_qos_remove_request() on uninitialized request in case + * of errors. + */ + policy->max_freq_req = policy->min_freq_req + 1; + + ret = dev_pm_qos_add_request(dev, policy->max_freq_req, + DEV_PM_QOS_MAX_FREQUENCY, + policy->max); + if (ret < 0) { + policy->max_freq_req = NULL; + dev_err(dev, "Failed to add max-freq constraint (%d)\n", + ret); + goto out_destroy_policy; + } } if (cpufreq_driver->get && has_target()) { @@ -2280,6 +2363,7 @@ int cpufreq_set_policy(struct cpufreq_policy *policy, struct cpufreq_policy *new_policy) { struct cpufreq_governor *old_gov; + struct device *cpu_dev = get_cpu_device(policy->cpu); int ret; pr_debug("setting new policy for CPU %u: %u - %u kHz\n", @@ -2288,17 +2372,21 @@ int cpufreq_set_policy(struct cpufreq_policy *policy, memcpy(&new_policy->cpuinfo, &policy->cpuinfo, sizeof(policy->cpuinfo)); /* - * This check works well when we store new min/max freq attributes, - * because new_policy is a copy of policy with one field updated. - */ - if (new_policy->min > new_policy->max) - return -EINVAL; + * PM QoS framework collects all the requests from users and provide us + * the final aggregated value here. + */ + new_policy->min = dev_pm_qos_read_value(cpu_dev, DEV_PM_QOS_MIN_FREQUENCY); + new_policy->max = dev_pm_qos_read_value(cpu_dev, DEV_PM_QOS_MAX_FREQUENCY); /* verify the cpu speed can be set within this limit */ ret = cpufreq_driver->verify(new_policy); if (ret) return ret; + /* + * The notifier-chain shall be removed once all the users of + * CPUFREQ_ADJUST are moved to use the QoS framework. + */ /* adjust if necessary - all reasons */ blocking_notifier_call_chain(&cpufreq_policy_notifier_list, CPUFREQ_ADJUST, new_policy); @@ -2377,10 +2465,9 @@ int cpufreq_set_policy(struct cpufreq_policy *policy, * @cpu: CPU to re-evaluate the policy for. * * Update the current frequency for the cpufreq policy of @cpu and use - * cpufreq_set_policy() to re-apply the min and max limits saved in the - * user_policy sub-structure of that policy, which triggers the evaluation - * of policy notifiers and the cpufreq driver's ->verify() callback for the - * policy in question, among other things. + * cpufreq_set_policy() to re-apply the min and max limits, which triggers the + * evaluation of policy notifiers and the cpufreq driver's ->verify() callback + * for the policy in question, among other things. */ void cpufreq_update_policy(unsigned int cpu) { @@ -2440,10 +2527,9 @@ static int cpufreq_boost_set_sw(int state) break; } - down_write(&policy->rwsem); - policy->user_policy.max = policy->max; - cpufreq_governor_limits(policy); - up_write(&policy->rwsem); + ret = dev_pm_qos_update_request(policy->max_freq_req, policy->max); + if (ret) + break; } return ret; diff --git a/drivers/cpufreq/davinci-cpufreq.c b/drivers/cpufreq/davinci-cpufreq.c index 3de48ae60c29..297d23cad8b5 100644 --- a/drivers/cpufreq/davinci-cpufreq.c +++ b/drivers/cpufreq/davinci-cpufreq.c @@ -90,7 +90,8 @@ static int davinci_cpu_init(struct cpufreq_policy *policy) * Setting the latency to 2000 us to accommodate addition of drivers * to pre/post change notification list. */ - return cpufreq_generic_init(policy, freq_table, 2000 * 1000); + cpufreq_generic_init(policy, freq_table, 2000 * 1000); + return 0; } static struct cpufreq_driver davinci_driver = { diff --git a/drivers/cpufreq/imx-cpufreq-dt.c b/drivers/cpufreq/imx-cpufreq-dt.c index b54fd26ea7df..4f85f3112784 100644 --- a/drivers/cpufreq/imx-cpufreq-dt.c +++ b/drivers/cpufreq/imx-cpufreq-dt.c @@ -44,10 +44,11 @@ static int imx_cpufreq_dt_probe(struct platform_device *pdev) * According to datasheet minimum speed grading is not supported for * consumer parts so clamp to 1 to avoid warning for "no OPPs" * - * Applies to 8mq and 8mm. + * Applies to i.MX8M series SoCs. */ if (mkt_segment == 0 && speed_grade == 0 && ( of_machine_is_compatible("fsl,imx8mm") || + of_machine_is_compatible("fsl,imx8mn") || of_machine_is_compatible("fsl,imx8mq"))) speed_grade = 1; diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c index 47ccfa6b17b7..648a09a1778a 100644 --- a/drivers/cpufreq/imx6q-cpufreq.c +++ b/drivers/cpufreq/imx6q-cpufreq.c @@ -190,14 +190,12 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index) static int imx6q_cpufreq_init(struct cpufreq_policy *policy) { - int ret; - policy->clk = clks[ARM].clk; - ret = cpufreq_generic_init(policy, freq_table, transition_latency); + cpufreq_generic_init(policy, freq_table, transition_latency); policy->suspend_freq = max_freq; dev_pm_opp_of_register_em(policy->cpus); - return ret; + return 0; } static struct cpufreq_driver imx6q_cpufreq_driver = { diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index f2ff5de988c1..cc27d4c59dca 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -898,7 +898,6 @@ static void intel_pstate_update_policies(void) static void intel_pstate_update_max_freq(unsigned int cpu) { struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu); - struct cpufreq_policy new_policy; struct cpudata *cpudata; if (!policy) @@ -908,11 +907,7 @@ static void intel_pstate_update_max_freq(unsigned int cpu) policy->cpuinfo.max_freq = global.turbo_disabled_mf ? cpudata->pstate.max_freq : cpudata->pstate.turbo_freq; - memcpy(&new_policy, policy, sizeof(*policy)); - new_policy.max = min(policy->user_policy.max, policy->cpuinfo.max_freq); - new_policy.min = min(policy->user_policy.min, new_policy.max); - - cpufreq_set_policy(policy, &new_policy); + refresh_frequency_limits(policy); cpufreq_cpu_release(policy); } diff --git a/drivers/cpufreq/kirkwood-cpufreq.c b/drivers/cpufreq/kirkwood-cpufreq.c index 7ab564c1f7ae..cb74bdc5baaa 100644 --- a/drivers/cpufreq/kirkwood-cpufreq.c +++ b/drivers/cpufreq/kirkwood-cpufreq.c @@ -85,7 +85,8 @@ static int kirkwood_cpufreq_target(struct cpufreq_policy *policy, /* Module init and exit code */ static int kirkwood_cpufreq_cpu_init(struct cpufreq_policy *policy) { - return cpufreq_generic_init(policy, kirkwood_freq_table, 5000); + cpufreq_generic_init(policy, kirkwood_freq_table, 5000); + return 0; } static struct cpufreq_driver kirkwood_cpufreq_driver = { diff --git a/drivers/cpufreq/loongson1-cpufreq.c b/drivers/cpufreq/loongson1-cpufreq.c index 21c9ce8526c0..0ea88778882a 100644 --- a/drivers/cpufreq/loongson1-cpufreq.c +++ b/drivers/cpufreq/loongson1-cpufreq.c @@ -81,7 +81,7 @@ static int ls1x_cpufreq_init(struct cpufreq_policy *policy) struct device *cpu_dev = get_cpu_device(policy->cpu); struct cpufreq_frequency_table *freq_tbl; unsigned int pll_freq, freq; - int steps, i, ret; + int steps, i; pll_freq = clk_get_rate(cpufreq->pll_clk) / 1000; @@ -103,11 +103,9 @@ static int ls1x_cpufreq_init(struct cpufreq_policy *policy) freq_tbl[i].frequency = CPUFREQ_TABLE_END; policy->clk = cpufreq->clk; - ret = cpufreq_generic_init(policy, freq_tbl, 0); - if (ret) - kfree(freq_tbl); + cpufreq_generic_init(policy, freq_tbl, 0); - return ret; + return 0; } static int ls1x_cpufreq_exit(struct cpufreq_policy *policy) |