diff options
Diffstat (limited to 'include/linux/pm_qos.h')
| -rw-r--r-- | include/linux/pm_qos.h | 220 |
1 files changed, 149 insertions, 71 deletions
diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h index 6ea1ae373d77..6cea4455f867 100644 --- a/include/linux/pm_qos.h +++ b/include/linux/pm_qos.h @@ -1,25 +1,20 @@ /* 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. +/* + * Definitions related to Power Management Quality of Service (PM QoS). * - * Mark Gross <mgross@linux.intel.com> + * Copyright (C) 2020 Intel Corporation + * + * Authors: + * Mark Gross <mgross@linux.intel.com> + * Rafael J. Wysocki <rafael.j.wysocki@intel.com> */ + +#ifndef _LINUX_PM_QOS_H +#define _LINUX_PM_QOS_H + #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, - PM_QOS_NETWORK_LATENCY, - PM_QOS_NETWORK_THROUGHPUT, - PM_QOS_MEMORY_BANDWIDTH, - - /* insert new class ID */ - PM_QOS_NUM_CLASSES, -}; enum pm_qos_flags_status { PM_QOS_FLAGS_UNDEFINED = -1, @@ -32,49 +27,21 @@ enum pm_qos_flags_status { #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_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC) -#define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0 -#define PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE 0 +#define PM_QOS_CPU_LATENCY_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 dev_pm_qos_req_type { - DEV_PM_QOS_RESUME_LATENCY = 1, - DEV_PM_QOS_LATENCY_TOLERANCE, - 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; - } data; - struct device *dev; -}; - 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 */ }; /* @@ -91,14 +58,66 @@ struct pm_qos_constraints { struct blocking_notifier_head *notifiers; }; +struct pm_qos_request { + struct plist_node node; + struct pm_qos_constraints *qos; +}; + +struct pm_qos_flags_request { + struct list_head node; + s32 flags; /* Do not change to 64 bit */ +}; + 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; @@ -117,38 +136,56 @@ static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req) return req->dev != NULL; } +s32 pm_qos_read_value(struct pm_qos_constraints *c); 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_CPU_IDLE +s32 cpu_latency_qos_limit(void); +bool cpu_latency_qos_request_active(struct pm_qos_request *req); +void cpu_latency_qos_add_request(struct pm_qos_request *req, s32 value); +void cpu_latency_qos_update_request(struct pm_qos_request *req, s32 new_value); +void cpu_latency_qos_remove_request(struct pm_qos_request *req); +#else +static inline s32 cpu_latency_qos_limit(void) { return INT_MAX; } +static inline bool cpu_latency_qos_request_active(struct pm_qos_request *req) +{ + return false; +} +static inline void cpu_latency_qos_add_request(struct pm_qos_request *req, + s32 value) {} +static inline void cpu_latency_qos_update_request(struct pm_qos_request *req, + s32 new_value) {} +static inline void cpu_latency_qos_remove_request(struct pm_qos_request *req) {} +#endif + +#ifdef CONFIG_PM_QOS_CPU_SYSTEM_WAKEUP +s32 cpu_wakeup_latency_qos_limit(void); +#else +static inline s32 cpu_wakeup_latency_qos_limit(void) +{ + return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; +} +#endif #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_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); + 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, @@ -174,7 +211,7 @@ 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_resume_latency(struct device *dev) { return IS_ERR_OR_NULL(dev->power.qos) ? PM_QOS_RESUME_LATENCY_NO_CONSTRAINT : @@ -187,10 +224,24 @@ 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) +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, @@ -202,10 +253,12 @@ 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) { @@ -241,10 +294,35 @@ 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_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 |