[PATCH V2 2/5] PM / QOS: Pass request type to dev_pm_qos_read_value()
From: Viresh Kumar
Date: Thu Feb 21 2019 - 06:29:57 EST
In order to use dev_pm_qos_read_value(), and other internal routines to
it, to read values for different QoS requests, pass request type as a
parameter to these routines.
For now, it only supports resume-latency request type.
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
---
Documentation/power/pm_qos_interface.txt | 2 +-
drivers/base/power/domain_governor.c | 4 +--
drivers/base/power/qos.c | 10 +++---
drivers/base/power/runtime.c | 2 +-
drivers/cpuidle/governor.c | 2 +-
include/linux/pm_qos.h | 41 +++++++++++++++++-------
6 files changed, 40 insertions(+), 21 deletions(-)
diff --git a/Documentation/power/pm_qos_interface.txt b/Documentation/power/pm_qos_interface.txt
index ec7d662d1707..cfcb1df39799 100644
--- a/Documentation/power/pm_qos_interface.txt
+++ b/Documentation/power/pm_qos_interface.txt
@@ -123,7 +123,7 @@ Will remove the element. After removal it will update the aggregate target and
call the notification trees if the target was changed as a result of removing
the request.
-s32 dev_pm_qos_read_value(device):
+s32 dev_pm_qos_read_value(device, type):
Returns the aggregated value for a given device's constraints list.
enum pm_qos_flags_status dev_pm_qos_flags(device, mask)
diff --git a/drivers/base/power/domain_governor.c b/drivers/base/power/domain_governor.c
index 99896fbf18e4..c36925adba69 100644
--- a/drivers/base/power/domain_governor.c
+++ b/drivers/base/power/domain_governor.c
@@ -32,7 +32,7 @@ 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;
}
@@ -65,7 +65,7 @@ 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_read_value(dev, DEV_PM_QOS_RESUME_LATENCY);
spin_unlock_irqrestore(&dev->power.lock, flags);
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index 49672f9dc8c4..fda7266970e9 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -96,27 +96,29 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_flags);
/**
* __dev_pm_qos_read_value - Get PM QoS constraint for a given device.
* @dev: Device to get the PM QoS constraint value for.
+ * @type: QoS request type.
*
* This routine must be called with dev->power.lock held.
*/
-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)
{
lockdep_assert_held(&dev->power.lock);
- return dev_pm_qos_raw_read_value(dev);
+ return dev_pm_qos_raw_read_value(dev, type);
}
/**
* 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)
{
unsigned long flags;
s32 ret;
spin_lock_irqsave(&dev->power.lock, flags);
- ret = __dev_pm_qos_read_value(dev);
+ ret = __dev_pm_qos_read_value(dev, type);
spin_unlock_irqrestore(&dev->power.lock, flags);
return ret;
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 04407d9f76fd..997cd420accc 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -267,7 +267,7 @@ 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_read_value(dev, DEV_PM_QOS_RESUME_LATENCY) == 0)
retval = -EPERM;
else if (dev->power.runtime_status == RPM_SUSPENDED)
retval = 1;
diff --git a/drivers/cpuidle/governor.c b/drivers/cpuidle/governor.c
index bb93e5cf6a4a..251d3ef4a1e5 100644
--- a/drivers/cpuidle/governor.c
+++ b/drivers/cpuidle/governor.c
@@ -109,7 +109,7 @@ int cpuidle_governor_latency_req(unsigned int cpu)
{
int global_req = pm_qos_request(PM_QOS_CPU_DMA_LATENCY);
struct device *device = get_cpu_device(cpu);
- int device_req = dev_pm_qos_raw_read_value(device);
+ int device_req = dev_pm_qos_raw_read_value(device, DEV_PM_QOS_RESUME_LATENCY);
return device_req < global_req ? device_req : global_req;
}
diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
index 1f4d456e8fff..55814d48c39c 100644
--- a/include/linux/pm_qos.h
+++ b/include/linux/pm_qos.h
@@ -139,8 +139,8 @@ s32 pm_qos_read_value(struct pm_qos_constraints *c);
#ifdef CONFIG_PM
enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask);
enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask);
-s32 __dev_pm_qos_read_value(struct device *dev);
-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);
+s32 dev_pm_qos_read_value(struct device *dev, enum dev_pm_qos_req_type type);
int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
enum dev_pm_qos_req_type type, s32 value);
int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value);
@@ -176,11 +176,19 @@ static inline s32 dev_pm_qos_requested_flags(struct device *dev)
return dev->power.qos->flags_req->data.flr.flags;
}
-static inline s32 dev_pm_qos_raw_read_value(struct device *dev)
+static inline s32 dev_pm_qos_raw_read_value(struct device *dev,
+ enum dev_pm_qos_req_type type)
{
- return IS_ERR_OR_NULL(dev->power.qos) ?
- PM_QOS_RESUME_LATENCY_NO_CONSTRAINT :
- pm_qos_read_value(&dev->power.qos->resume_latency);
+ struct dev_pm_qos *qos = dev->power.qos;
+
+ switch (type) {
+ case DEV_PM_QOS_RESUME_LATENCY:
+ return IS_ERR_OR_NULL(qos) ? PM_QOS_RESUME_LATENCY_NO_CONSTRAINT
+ : pm_qos_read_value(&qos->resume_latency);
+ default:
+ WARN_ON(1);
+ return 0;
+ }
}
#else
static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev,
@@ -189,10 +197,6 @@ static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev,
static inline enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev,
s32 mask)
{ return PM_QOS_FLAGS_UNDEFINED; }
-static inline s32 __dev_pm_qos_read_value(struct device *dev)
- { return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; }
-static inline s32 dev_pm_qos_read_value(struct device *dev)
- { return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; }
static inline int dev_pm_qos_add_request(struct device *dev,
struct dev_pm_qos_request *req,
enum dev_pm_qos_req_type type,
@@ -245,10 +249,23 @@ static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev)
return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
}
static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; }
-static inline s32 dev_pm_qos_raw_read_value(struct device *dev)
+
+static inline s32 dev_pm_qos_raw_read_value(struct device *dev,
+ enum dev_pm_qos_req_type type)
{
- return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
+ switch type {
+ case DEV_PM_QOS_RESUME_LATENCY:
+ return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
+ default:
+ WARN_ON(1);
+ return 0;
+ }
}
+
+static inline s32 __dev_pm_qos_read_value(struct device *dev, enum dev_pm_qos_req_type type)
+ { return dev_pm_qos_raw_read_value(dev, type); }
+static inline s32 dev_pm_qos_read_value(struct device *dev, enum dev_pm_qos_req_type type)
+ { return dev_pm_qos_raw_read_value(dev, type); }
#endif
#endif
--
2.21.0.rc0.269.g1a574e7a288b