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242 lines
8.3 KiB
242 lines
8.3 KiB
#ifndef _LINUX_PM_QOS_H |
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#define _LINUX_PM_QOS_H |
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/* interface for the pm_qos_power infrastructure of the linux kernel. |
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* |
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* Mark Gross <[email protected]> |
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*/ |
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#include <linux/plist.h> |
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#include <linux/notifier.h> |
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#include <linux/miscdevice.h> |
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#include <linux/device.h> |
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#include <linux/workqueue.h> |
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enum { |
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PM_QOS_RESERVED = 0, |
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PM_QOS_CPU_DMA_LATENCY, |
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PM_QOS_NETWORK_LATENCY, |
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PM_QOS_NETWORK_THROUGHPUT, |
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PM_QOS_MEMORY_BANDWIDTH, |
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/* insert new class ID */ |
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PM_QOS_NUM_CLASSES, |
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}; |
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enum pm_qos_flags_status { |
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PM_QOS_FLAGS_UNDEFINED = -1, |
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PM_QOS_FLAGS_NONE, |
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PM_QOS_FLAGS_SOME, |
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PM_QOS_FLAGS_ALL, |
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}; |
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#define PM_QOS_DEFAULT_VALUE -1 |
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#define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC) |
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#define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC) |
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#define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0 |
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#define PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE 0 |
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#define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE 0 |
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#define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE 0 |
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#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1) |
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#define PM_QOS_LATENCY_ANY ((s32)(~(__u32)0 >> 1)) |
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#define PM_QOS_FLAG_NO_POWER_OFF (1 << 0) |
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#define PM_QOS_FLAG_REMOTE_WAKEUP (1 << 1) |
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struct pm_qos_request { |
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struct plist_node node; |
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int pm_qos_class; |
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struct delayed_work work; /* for pm_qos_update_request_timeout */ |
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}; |
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struct pm_qos_flags_request { |
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struct list_head node; |
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s32 flags; /* Do not change to 64 bit */ |
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}; |
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enum dev_pm_qos_req_type { |
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DEV_PM_QOS_RESUME_LATENCY = 1, |
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DEV_PM_QOS_LATENCY_TOLERANCE, |
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DEV_PM_QOS_FLAGS, |
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}; |
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struct dev_pm_qos_request { |
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enum dev_pm_qos_req_type type; |
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union { |
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struct plist_node pnode; |
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struct pm_qos_flags_request flr; |
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} data; |
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struct device *dev; |
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}; |
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enum pm_qos_type { |
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PM_QOS_UNITIALIZED, |
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PM_QOS_MAX, /* return the largest value */ |
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PM_QOS_MIN, /* return the smallest value */ |
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PM_QOS_SUM /* return the sum */ |
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}; |
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/* |
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* Note: The lockless read path depends on the CPU accessing target_value |
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* or effective_flags atomically. Atomic access is only guaranteed on all CPU |
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* types linux supports for 32 bit quantites |
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*/ |
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struct pm_qos_constraints { |
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struct plist_head list; |
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s32 target_value; /* Do not change to 64 bit */ |
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s32 default_value; |
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s32 no_constraint_value; |
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enum pm_qos_type type; |
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struct blocking_notifier_head *notifiers; |
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}; |
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struct pm_qos_flags { |
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struct list_head list; |
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s32 effective_flags; /* Do not change to 64 bit */ |
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}; |
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struct dev_pm_qos { |
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struct pm_qos_constraints resume_latency; |
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struct pm_qos_constraints latency_tolerance; |
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struct pm_qos_flags flags; |
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struct dev_pm_qos_request *resume_latency_req; |
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struct dev_pm_qos_request *latency_tolerance_req; |
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struct dev_pm_qos_request *flags_req; |
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}; |
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/* Action requested to pm_qos_update_target */ |
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enum pm_qos_req_action { |
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PM_QOS_ADD_REQ, /* Add a new request */ |
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PM_QOS_UPDATE_REQ, /* Update an existing request */ |
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PM_QOS_REMOVE_REQ /* Remove an existing request */ |
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}; |
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static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req) |
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{ |
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return req->dev != NULL; |
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} |
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int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node, |
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enum pm_qos_req_action action, int value); |
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bool pm_qos_update_flags(struct pm_qos_flags *pqf, |
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struct pm_qos_flags_request *req, |
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enum pm_qos_req_action action, s32 val); |
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void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class, |
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s32 value); |
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void pm_qos_update_request(struct pm_qos_request *req, |
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s32 new_value); |
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void pm_qos_update_request_timeout(struct pm_qos_request *req, |
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s32 new_value, unsigned long timeout_us); |
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void pm_qos_remove_request(struct pm_qos_request *req); |
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int pm_qos_request(int pm_qos_class); |
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int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier); |
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int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier); |
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int pm_qos_request_active(struct pm_qos_request *req); |
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s32 pm_qos_read_value(struct pm_qos_constraints *c); |
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#ifdef CONFIG_PM |
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enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask); |
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enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask); |
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s32 __dev_pm_qos_read_value(struct device *dev); |
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s32 dev_pm_qos_read_value(struct device *dev); |
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int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req, |
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enum dev_pm_qos_req_type type, s32 value); |
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int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value); |
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int dev_pm_qos_remove_request(struct dev_pm_qos_request *req); |
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int dev_pm_qos_add_notifier(struct device *dev, |
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struct notifier_block *notifier); |
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int dev_pm_qos_remove_notifier(struct device *dev, |
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struct notifier_block *notifier); |
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int dev_pm_qos_add_global_notifier(struct notifier_block *notifier); |
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int dev_pm_qos_remove_global_notifier(struct notifier_block *notifier); |
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void dev_pm_qos_constraints_init(struct device *dev); |
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void dev_pm_qos_constraints_destroy(struct device *dev); |
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int dev_pm_qos_add_ancestor_request(struct device *dev, |
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struct dev_pm_qos_request *req, |
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enum dev_pm_qos_req_type type, s32 value); |
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int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value); |
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void dev_pm_qos_hide_latency_limit(struct device *dev); |
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int dev_pm_qos_expose_flags(struct device *dev, s32 value); |
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void dev_pm_qos_hide_flags(struct device *dev); |
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int dev_pm_qos_update_flags(struct device *dev, s32 mask, bool set); |
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s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev); |
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int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val); |
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int dev_pm_qos_expose_latency_tolerance(struct device *dev); |
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void dev_pm_qos_hide_latency_tolerance(struct device *dev); |
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static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev) |
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{ |
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return dev->power.qos->resume_latency_req->data.pnode.prio; |
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} |
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static inline s32 dev_pm_qos_requested_flags(struct device *dev) |
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{ |
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return dev->power.qos->flags_req->data.flr.flags; |
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} |
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#else |
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static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, |
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s32 mask) |
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{ return PM_QOS_FLAGS_UNDEFINED; } |
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static inline enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, |
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s32 mask) |
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{ return PM_QOS_FLAGS_UNDEFINED; } |
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static inline s32 __dev_pm_qos_read_value(struct device *dev) |
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{ return 0; } |
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static inline s32 dev_pm_qos_read_value(struct device *dev) |
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{ return 0; } |
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static inline int dev_pm_qos_add_request(struct device *dev, |
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struct dev_pm_qos_request *req, |
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enum dev_pm_qos_req_type type, |
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s32 value) |
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{ return 0; } |
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static inline int dev_pm_qos_update_request(struct dev_pm_qos_request *req, |
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s32 new_value) |
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{ return 0; } |
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static inline int dev_pm_qos_remove_request(struct dev_pm_qos_request *req) |
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{ return 0; } |
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static inline int dev_pm_qos_add_notifier(struct device *dev, |
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struct notifier_block *notifier) |
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{ return 0; } |
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static inline int dev_pm_qos_remove_notifier(struct device *dev, |
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struct notifier_block *notifier) |
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{ return 0; } |
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static inline int dev_pm_qos_add_global_notifier( |
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struct notifier_block *notifier) |
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{ return 0; } |
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static inline int dev_pm_qos_remove_global_notifier( |
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struct notifier_block *notifier) |
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{ return 0; } |
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static inline void dev_pm_qos_constraints_init(struct device *dev) |
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{ |
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dev->power.power_state = PMSG_ON; |
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} |
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static inline void dev_pm_qos_constraints_destroy(struct device *dev) |
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{ |
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dev->power.power_state = PMSG_INVALID; |
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} |
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static inline int dev_pm_qos_add_ancestor_request(struct device *dev, |
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struct dev_pm_qos_request *req, |
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enum dev_pm_qos_req_type type, |
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s32 value) |
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{ return 0; } |
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static inline int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value) |
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{ return 0; } |
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static inline void dev_pm_qos_hide_latency_limit(struct device *dev) {} |
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static inline int dev_pm_qos_expose_flags(struct device *dev, s32 value) |
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{ return 0; } |
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static inline void dev_pm_qos_hide_flags(struct device *dev) {} |
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static inline int dev_pm_qos_update_flags(struct device *dev, s32 m, bool set) |
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{ return 0; } |
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static inline s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev) |
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{ return PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; } |
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static inline int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val) |
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{ return 0; } |
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static inline int dev_pm_qos_expose_latency_tolerance(struct device *dev) |
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{ return 0; } |
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static inline void dev_pm_qos_hide_latency_tolerance(struct device *dev) {} |
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static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev) { return 0; } |
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static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; } |
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#endif |
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#endif
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