mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
36a8015f89
Support for adding per-device frequency limits was removed in
commit 2aac8bdf7a ("PM: QoS: Drop frequency QoS types from device PM QoS")
after cpufreq switched to use a new "freq_constraints" construct.
Restore support for per-device freq limits but base this upon
freq_constraints. This is primarily meant to be used by the devfreq
subsystem.
This removes the "static" marking on freq_qos_apply but does not export
it for modules.
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Tested-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
317 lines
10 KiB
C
317 lines
10 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_PM_QOS_H
|
|
#define _LINUX_PM_QOS_H
|
|
/* interface for the pm_qos_power infrastructure of the linux kernel.
|
|
*
|
|
* Mark Gross <mgross@linux.intel.com>
|
|
*/
|
|
#include <linux/plist.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/device.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
enum {
|
|
PM_QOS_RESERVED = 0,
|
|
PM_QOS_CPU_DMA_LATENCY,
|
|
|
|
/* insert new class ID */
|
|
PM_QOS_NUM_CLASSES,
|
|
};
|
|
|
|
enum pm_qos_flags_status {
|
|
PM_QOS_FLAGS_UNDEFINED = -1,
|
|
PM_QOS_FLAGS_NONE,
|
|
PM_QOS_FLAGS_SOME,
|
|
PM_QOS_FLAGS_ALL,
|
|
};
|
|
|
|
#define PM_QOS_DEFAULT_VALUE (-1)
|
|
#define PM_QOS_LATENCY_ANY S32_MAX
|
|
#define PM_QOS_LATENCY_ANY_NS ((s64)PM_QOS_LATENCY_ANY * NSEC_PER_USEC)
|
|
|
|
#define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
|
|
#define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE PM_QOS_LATENCY_ANY
|
|
#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT PM_QOS_LATENCY_ANY
|
|
#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS PM_QOS_LATENCY_ANY_NS
|
|
#define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE 0
|
|
#define PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE 0
|
|
#define PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE FREQ_QOS_MAX_DEFAULT_VALUE
|
|
#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1)
|
|
|
|
#define PM_QOS_FLAG_NO_POWER_OFF (1 << 0)
|
|
|
|
struct pm_qos_request {
|
|
struct plist_node node;
|
|
int pm_qos_class;
|
|
struct delayed_work work; /* for pm_qos_update_request_timeout */
|
|
};
|
|
|
|
struct pm_qos_flags_request {
|
|
struct list_head node;
|
|
s32 flags; /* Do not change to 64 bit */
|
|
};
|
|
|
|
enum pm_qos_type {
|
|
PM_QOS_UNITIALIZED,
|
|
PM_QOS_MAX, /* return the largest value */
|
|
PM_QOS_MIN, /* return the smallest value */
|
|
PM_QOS_SUM /* return the sum */
|
|
};
|
|
|
|
/*
|
|
* Note: The lockless read path depends on the CPU accessing target_value
|
|
* or effective_flags atomically. Atomic access is only guaranteed on all CPU
|
|
* types linux supports for 32 bit quantites
|
|
*/
|
|
struct pm_qos_constraints {
|
|
struct plist_head list;
|
|
s32 target_value; /* Do not change to 64 bit */
|
|
s32 default_value;
|
|
s32 no_constraint_value;
|
|
enum pm_qos_type type;
|
|
struct blocking_notifier_head *notifiers;
|
|
};
|
|
|
|
struct pm_qos_flags {
|
|
struct list_head list;
|
|
s32 effective_flags; /* Do not change to 64 bit */
|
|
};
|
|
|
|
|
|
#define FREQ_QOS_MIN_DEFAULT_VALUE 0
|
|
#define FREQ_QOS_MAX_DEFAULT_VALUE S32_MAX
|
|
|
|
enum freq_qos_req_type {
|
|
FREQ_QOS_MIN = 1,
|
|
FREQ_QOS_MAX,
|
|
};
|
|
|
|
struct freq_constraints {
|
|
struct pm_qos_constraints min_freq;
|
|
struct blocking_notifier_head min_freq_notifiers;
|
|
struct pm_qos_constraints max_freq;
|
|
struct blocking_notifier_head max_freq_notifiers;
|
|
};
|
|
|
|
struct freq_qos_request {
|
|
enum freq_qos_req_type type;
|
|
struct plist_node pnode;
|
|
struct freq_constraints *qos;
|
|
};
|
|
|
|
|
|
enum dev_pm_qos_req_type {
|
|
DEV_PM_QOS_RESUME_LATENCY = 1,
|
|
DEV_PM_QOS_LATENCY_TOLERANCE,
|
|
DEV_PM_QOS_MIN_FREQUENCY,
|
|
DEV_PM_QOS_MAX_FREQUENCY,
|
|
DEV_PM_QOS_FLAGS,
|
|
};
|
|
|
|
struct dev_pm_qos_request {
|
|
enum dev_pm_qos_req_type type;
|
|
union {
|
|
struct plist_node pnode;
|
|
struct pm_qos_flags_request flr;
|
|
struct freq_qos_request freq;
|
|
} data;
|
|
struct device *dev;
|
|
};
|
|
|
|
struct dev_pm_qos {
|
|
struct pm_qos_constraints resume_latency;
|
|
struct pm_qos_constraints latency_tolerance;
|
|
struct freq_constraints freq;
|
|
struct pm_qos_flags flags;
|
|
struct dev_pm_qos_request *resume_latency_req;
|
|
struct dev_pm_qos_request *latency_tolerance_req;
|
|
struct dev_pm_qos_request *flags_req;
|
|
};
|
|
|
|
/* Action requested to pm_qos_update_target */
|
|
enum pm_qos_req_action {
|
|
PM_QOS_ADD_REQ, /* Add a new request */
|
|
PM_QOS_UPDATE_REQ, /* Update an existing request */
|
|
PM_QOS_REMOVE_REQ /* Remove an existing request */
|
|
};
|
|
|
|
static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req)
|
|
{
|
|
return req->dev != NULL;
|
|
}
|
|
|
|
int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
|
|
enum pm_qos_req_action action, int value);
|
|
bool pm_qos_update_flags(struct pm_qos_flags *pqf,
|
|
struct pm_qos_flags_request *req,
|
|
enum pm_qos_req_action action, s32 val);
|
|
void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
|
|
s32 value);
|
|
void pm_qos_update_request(struct pm_qos_request *req,
|
|
s32 new_value);
|
|
void pm_qos_update_request_timeout(struct pm_qos_request *req,
|
|
s32 new_value, unsigned long timeout_us);
|
|
void pm_qos_remove_request(struct pm_qos_request *req);
|
|
|
|
int pm_qos_request(int pm_qos_class);
|
|
int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier);
|
|
int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
|
|
int pm_qos_request_active(struct pm_qos_request *req);
|
|
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_resume_latency(struct device *dev);
|
|
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);
|
|
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,
|
|
enum dev_pm_qos_req_type type);
|
|
int dev_pm_qos_remove_notifier(struct device *dev,
|
|
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,
|
|
struct dev_pm_qos_request *req,
|
|
enum dev_pm_qos_req_type type, s32 value);
|
|
int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value);
|
|
void dev_pm_qos_hide_latency_limit(struct device *dev);
|
|
int dev_pm_qos_expose_flags(struct device *dev, s32 value);
|
|
void dev_pm_qos_hide_flags(struct device *dev);
|
|
int dev_pm_qos_update_flags(struct device *dev, s32 mask, bool set);
|
|
s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev);
|
|
int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val);
|
|
int dev_pm_qos_expose_latency_tolerance(struct device *dev);
|
|
void dev_pm_qos_hide_latency_tolerance(struct device *dev);
|
|
|
|
static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev)
|
|
{
|
|
return dev->power.qos->resume_latency_req->data.pnode.prio;
|
|
}
|
|
|
|
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_resume_latency(struct device *dev)
|
|
{
|
|
return IS_ERR_OR_NULL(dev->power.qos) ?
|
|
PM_QOS_RESUME_LATENCY_NO_CONSTRAINT :
|
|
pm_qos_read_value(&dev->power.qos->resume_latency);
|
|
}
|
|
#else
|
|
static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev,
|
|
s32 mask)
|
|
{ return PM_QOS_FLAGS_UNDEFINED; }
|
|
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_resume_latency(struct device *dev)
|
|
{ return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; }
|
|
static inline s32 dev_pm_qos_read_value(struct device *dev,
|
|
enum dev_pm_qos_req_type type)
|
|
{
|
|
switch (type) {
|
|
case DEV_PM_QOS_RESUME_LATENCY:
|
|
return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
|
|
case DEV_PM_QOS_MIN_FREQUENCY:
|
|
return PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE;
|
|
case DEV_PM_QOS_MAX_FREQUENCY:
|
|
return PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE;
|
|
default:
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static inline int dev_pm_qos_add_request(struct device *dev,
|
|
struct dev_pm_qos_request *req,
|
|
enum dev_pm_qos_req_type type,
|
|
s32 value)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
|
|
s32 new_value)
|
|
{ return 0; }
|
|
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,
|
|
enum dev_pm_qos_req_type type)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_remove_notifier(struct device *dev,
|
|
struct notifier_block *notifier,
|
|
enum dev_pm_qos_req_type type)
|
|
{ return 0; }
|
|
static inline void dev_pm_qos_constraints_init(struct device *dev)
|
|
{
|
|
dev->power.power_state = PMSG_ON;
|
|
}
|
|
static inline void dev_pm_qos_constraints_destroy(struct device *dev)
|
|
{
|
|
dev->power.power_state = PMSG_INVALID;
|
|
}
|
|
static inline int dev_pm_qos_add_ancestor_request(struct device *dev,
|
|
struct dev_pm_qos_request *req,
|
|
enum dev_pm_qos_req_type type,
|
|
s32 value)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value)
|
|
{ return 0; }
|
|
static inline void dev_pm_qos_hide_latency_limit(struct device *dev) {}
|
|
static inline int dev_pm_qos_expose_flags(struct device *dev, s32 value)
|
|
{ return 0; }
|
|
static inline void dev_pm_qos_hide_flags(struct device *dev) {}
|
|
static inline int dev_pm_qos_update_flags(struct device *dev, s32 m, bool set)
|
|
{ return 0; }
|
|
static inline s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev)
|
|
{ return PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; }
|
|
static inline int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_expose_latency_tolerance(struct device *dev)
|
|
{ return 0; }
|
|
static inline void dev_pm_qos_hide_latency_tolerance(struct device *dev) {}
|
|
|
|
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_resume_latency(struct device *dev)
|
|
{
|
|
return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
|
|
}
|
|
#endif
|
|
|
|
static inline int freq_qos_request_active(struct freq_qos_request *req)
|
|
{
|
|
return !IS_ERR_OR_NULL(req->qos);
|
|
}
|
|
|
|
void freq_constraints_init(struct freq_constraints *qos);
|
|
|
|
s32 freq_qos_read_value(struct freq_constraints *qos,
|
|
enum freq_qos_req_type type);
|
|
|
|
int freq_qos_add_request(struct freq_constraints *qos,
|
|
struct freq_qos_request *req,
|
|
enum freq_qos_req_type type, s32 value);
|
|
int freq_qos_update_request(struct freq_qos_request *req, s32 new_value);
|
|
int freq_qos_remove_request(struct freq_qos_request *req);
|
|
int freq_qos_apply(struct freq_qos_request *req,
|
|
enum pm_qos_req_action action, s32 value);
|
|
|
|
int freq_qos_add_notifier(struct freq_constraints *qos,
|
|
enum freq_qos_req_type type,
|
|
struct notifier_block *notifier);
|
|
int freq_qos_remove_notifier(struct freq_constraints *qos,
|
|
enum freq_qos_req_type type,
|
|
struct notifier_block *notifier);
|
|
|
|
#endif
|