Commit 27d2c37e authored by Lukasz Luba's avatar Lukasz Luba Committed by Rafael J. Wysocki
Browse files

powercap/dtpm_devfreq: Use new Energy Model interface to get table 



Energy Model framework support modifications at runtime of the power
values. Use the new EM table API which is protected with RCU. Align the
code so that this RCU read section is short.

This change is not expected to alter the general functionality.

Reviewed-by: default avatarDietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: default avatarDietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: default avatarLukasz Luba <lukasz.luba@arm.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent e20b7a81

drivers/powercap/dtpm_devfreq.c

+23 −11
Original line number Diff line number Diff line
@@ -37,11 +37,16 @@ static int update_pd_power_uw(struct dtpm *dtpm) 
	struct devfreq *devfreq = dtpm_devfreq->devfreq;

	struct device *dev = devfreq->dev.parent;

	struct em_perf_domain *pd = em_pd_get(dev);

	struct em_perf_state *table;



	dtpm->power_min = pd->table[0].power;

	rcu_read_lock();

	table = em_perf_state_from_pd(pd);



	dtpm->power_max = pd->table[pd->nr_perf_states - 1].power;

	dtpm->power_min = table[0].power;



	dtpm->power_max = table[pd->nr_perf_states - 1].power;



	rcu_read_unlock();

	return 0;

}
@@ -51,20 +56,23 @@ static u64 set_pd_power_limit(struct dtpm *dtpm, u64 power_limit) 
	struct devfreq *devfreq = dtpm_devfreq->devfreq;

	struct device *dev = devfreq->dev.parent;

	struct em_perf_domain *pd = em_pd_get(dev);

	struct em_perf_state *table;

	unsigned long freq;

	int i;



	rcu_read_lock();

	table = em_perf_state_from_pd(pd);

	for (i = 0; i < pd->nr_perf_states; i++) {

		if (pd->table[i].power > power_limit)

		if (table[i].power > power_limit)

			break;

	}



	freq = pd->table[i - 1].frequency;

	freq = table[i - 1].frequency;

	power_limit = table[i - 1].power;

	rcu_read_unlock();



	dev_pm_qos_update_request(&dtpm_devfreq->qos_req, freq);



	power_limit = pd->table[i - 1].power;



	return power_limit;

}
@@ -89,8 +97,9 @@ static u64 get_pd_power_uw(struct dtpm *dtpm) 
	struct device *dev = devfreq->dev.parent;

	struct em_perf_domain *pd = em_pd_get(dev);

	struct devfreq_dev_status status;

	struct em_perf_state *table;

	unsigned long freq;

	u64 power;

	u64 power = 0;

	int i;



	mutex_lock(&devfreq->lock);
@@ -100,19 +109,22 @@ static u64 get_pd_power_uw(struct dtpm *dtpm) 
	freq = DIV_ROUND_UP(status.current_frequency, HZ_PER_KHZ);

	_normalize_load(&status);



	rcu_read_lock();

	table = em_perf_state_from_pd(pd);

	for (i = 0; i < pd->nr_perf_states; i++) {



		if (pd->table[i].frequency < freq)

		if (table[i].frequency < freq)

			continue;



		power = pd->table[i].power;

		power = table[i].power;

		power *= status.busy_time;

		power >>= 10;



		return power;

		break;

	}

	rcu_read_unlock();



	return 0;

	return power;

}



static void pd_release(struct dtpm *dtpm)