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Signed-off-by: Sibi Sankar Tested-by: Mike Tipton Reviewed-by: Cristian Marussi Reviewed-by: Lukasz Luba --- v8: * Drop patch 1 since it was picked up by Viresh * Leave policy->max update to the cpufreq_qos notifier [Vincent] * We sanitized the range_max from V3 since we dealt with policy->max, now we can drop the check and policy member from scmi_data. drivers/cpufreq/scmi-cpufreq.c | 45 ++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c index 07d6f9a9b7c8..b8fe758aeb01 100644 --- a/drivers/cpufreq/scmi-cpufreq.c +++ b/drivers/cpufreq/scmi-cpufreq.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -26,6 +27,8 @@ struct scmi_data { int nr_opp; struct device *cpu_dev; cpumask_var_t opp_shared_cpus; + struct notifier_block limit_notify_nb; + struct freq_qos_request limits_freq_req; }; static struct scmi_protocol_handle *ph; @@ -174,6 +177,22 @@ static struct freq_attr *scmi_cpufreq_hw_attr[] = { NULL, }; +static int scmi_limit_notify_cb(struct notifier_block *nb, unsigned long event, void *data) +{ + struct scmi_data *priv = container_of(nb, struct scmi_data, limit_notify_nb); + struct scmi_perf_limits_report *limit_notify = data; + unsigned int limit_freq_khz; + int ret; + + limit_freq_khz = limit_notify->range_max_freq / HZ_PER_KHZ; + + ret = freq_qos_update_request(&priv->limits_freq_req, limit_freq_khz); + if (ret < 0) + pr_warn("failed to update freq constraint: %d\n", ret); + + return NOTIFY_OK; +} + static int scmi_cpufreq_init(struct cpufreq_policy *policy) { int ret, nr_opp, domain; @@ -181,6 +200,7 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) struct device *cpu_dev; struct scmi_data *priv; struct cpufreq_frequency_table *freq_table; + struct scmi_device *sdev = cpufreq_get_driver_data(); cpu_dev = get_cpu_device(policy->cpu); if (!cpu_dev) { @@ -294,6 +314,23 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) } } + ret = freq_qos_add_request(&policy->constraints, &priv->limits_freq_req, FREQ_QOS_MAX, + FREQ_QOS_MAX_DEFAULT_VALUE); + if (ret < 0) { + dev_err(cpu_dev, "failed to add qos limits request: %d\n", ret); + goto out_free_table; + } + + priv->limit_notify_nb.notifier_call = scmi_limit_notify_cb; + ret = sdev->handle->notify_ops->event_notifier_register(sdev->handle, SCMI_PROTOCOL_PERF, + SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED, + &priv->domain_id, + &priv->limit_notify_nb); + if (ret) + dev_warn(&sdev->dev, + "failed to register for limits change notifier for domain %d\n", + priv->domain_id); + return 0; out_free_table: @@ -313,7 +350,13 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) static void scmi_cpufreq_exit(struct cpufreq_policy *policy) { struct scmi_data *priv = policy->driver_data; + struct scmi_device *sdev = cpufreq_get_driver_data(); + sdev->handle->notify_ops->event_notifier_unregister(sdev->handle, SCMI_PROTOCOL_PERF, + SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED, + &priv->domain_id, + &priv->limit_notify_nb); + freq_qos_remove_request(&priv->limits_freq_req); dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table); dev_pm_opp_remove_all_dynamic(priv->cpu_dev); free_cpumask_var(priv->opp_shared_cpus); @@ -372,6 +415,8 @@ static int scmi_cpufreq_probe(struct scmi_device *sdev) if (!handle) return -ENODEV; + scmi_cpufreq_driver.driver_data = sdev; + perf_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_PERF, &ph); if (IS_ERR(perf_ops)) return PTR_ERR(perf_ops);