From: Viresh Kumar <viresh.kumar@linaro.org>
To: Rafael Wysocki <rjw@rjwysocki.net>,
Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
Kevin Hilman <khilman@kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>,
linux-pm@vger.kernel.org,
Vincent Guittot <vincent.guittot@linaro.org>,
mka@chromium.org, juri.lelli@gmail.com, Qais.Yousef@arm.com,
linux-kernel@vger.kernel.org
Subject: [PATCH V2 1/5] PM / QOS: Pass request type to dev_pm_qos_{add|remove}_notifier()
Date: Thu, 21 Feb 2019 16:59:27 +0530 [thread overview]
Message-ID: <b0485135cc355c3686761c2e20039dfd961fd560.1550748118.git.viresh.kumar@linaro.org> (raw)
In-Reply-To: <cover.1550748118.git.viresh.kumar@linaro.org>
In order to use the same set of routines to register notifiers for
different request types, update the existing
dev_pm_qos_{add|remove}_notifier() routines with an additional
parameter: request-type.
For now, it only supports resume-latency request type.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
Documentation/power/pm_qos_interface.txt | 10 ++++++----
drivers/base/power/domain.c | 8 +++++---
drivers/base/power/qos.c | 14 ++++++++++++--
include/linux/pm_qos.h | 12 ++++++++----
4 files changed, 31 insertions(+), 13 deletions(-)
diff --git a/Documentation/power/pm_qos_interface.txt b/Documentation/power/pm_qos_interface.txt
index 19c5f7b1a7ba..ec7d662d1707 100644
--- a/Documentation/power/pm_qos_interface.txt
+++ b/Documentation/power/pm_qos_interface.txt
@@ -164,12 +164,14 @@ directory.
Notification mechanisms:
The per-device PM QoS framework has a per-device notification tree.
-int dev_pm_qos_add_notifier(device, notifier):
-Adds a notification callback function for the device.
+int dev_pm_qos_add_notifier(device, notifier, type):
+Adds a notification callback function for the device for a particular request
+type.
+
The callback is called when the aggregated value of the device constraints list
-is changed (for resume latency device PM QoS only).
+is changed.
-int dev_pm_qos_remove_notifier(device, notifier):
+int dev_pm_qos_remove_notifier(device, notifier, type):
Removes the notification callback function for the device.
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 2c334c01fc43..d8c37945a26d 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1486,7 +1486,8 @@ 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;
}
@@ -1519,7 +1520,8 @@ 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);
@@ -1546,7 +1548,7 @@ 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/qos.c b/drivers/base/power/qos.c
index 3382542b39b7..49672f9dc8c4 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -471,6 +471,7 @@ 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.
@@ -478,10 +479,14 @@ 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;
+ if (WARN_ON(type != DEV_PM_QOS_RESUME_LATENCY))
+ return -EINVAL;
+
mutex_lock(&dev_pm_qos_mtx);
if (IS_ERR(dev->power.qos))
@@ -504,15 +509,20 @@ 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;
+ if (WARN_ON(type != DEV_PM_QOS_RESUME_LATENCY))
+ return -EINVAL;
+
mutex_lock(&dev_pm_qos_mtx);
/* Silently return if the constraints object is not present. */
diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
index 6ea1ae373d77..1f4d456e8fff 100644
--- a/include/linux/pm_qos.h
+++ b/include/linux/pm_qos.h
@@ -146,9 +146,11 @@ int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value);
int dev_pm_qos_remove_request(struct dev_pm_qos_request *req);
int dev_pm_qos_add_notifier(struct device *dev,
- struct notifier_block *notifier);
+ struct notifier_block *notifier,
+ enum dev_pm_qos_req_type type);
int dev_pm_qos_remove_notifier(struct device *dev,
- struct notifier_block *notifier);
+ struct notifier_block *notifier,
+ enum dev_pm_qos_req_type type);
void dev_pm_qos_constraints_init(struct device *dev);
void dev_pm_qos_constraints_destroy(struct device *dev);
int dev_pm_qos_add_ancestor_request(struct device *dev,
@@ -202,10 +204,12 @@ static inline int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
static inline int dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
{ return 0; }
static inline int dev_pm_qos_add_notifier(struct device *dev,
- struct notifier_block *notifier)
+ struct notifier_block *notifier,
+ enum dev_pm_qos_req_type type);
{ return 0; }
static inline int dev_pm_qos_remove_notifier(struct device *dev,
- struct notifier_block *notifier)
+ struct notifier_block *notifier,
+ enum dev_pm_qos_req_type type)
{ return 0; }
static inline void dev_pm_qos_constraints_init(struct device *dev)
{
--
2.21.0.rc0.269.g1a574e7a288b
next prev parent reply other threads:[~2019-02-21 11:29 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-21 11:29 [PATCH V2 0/5] cpufreq: Use QoS layer to manage freq-constraints Viresh Kumar
2019-02-21 11:29 ` Viresh Kumar [this message]
2019-02-21 11:29 ` [PATCH V2 2/5] PM / QOS: Pass request type to dev_pm_qos_read_value() Viresh Kumar
2019-02-21 11:29 ` [PATCH V2 3/5] PM / QoS: Add support for MIN/MAX frequency constraints Viresh Kumar
2019-02-21 11:29 ` [PATCH V2 4/5] cpufreq: Register notifiers with the PM QoS framework Viresh Kumar
2019-02-22 11:44 ` Qais Yousef
2019-02-25 4:31 ` Viresh Kumar
2019-02-25 8:58 ` Qais Yousef
2019-02-25 9:09 ` Viresh Kumar
2019-02-25 12:14 ` Qais Yousef
2019-02-26 2:30 ` Viresh Kumar
2019-02-26 10:00 ` Qais Yousef
2019-02-21 11:29 ` [PATCH V2 5/5] cpufreq: Add QoS requests for userspace constraints Viresh Kumar
2019-02-21 11:30 ` [PATCH V2 0/5] cpufreq: Use QoS layer to manage freq-constraints Rafael J. Wysocki
2019-04-08 10:46 ` Viresh Kumar
2019-05-20 6:16 ` Viresh Kumar
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