From bedbef8ad3e75a304af6361af235302bcc61d06b Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 14 May 2024 06:39:01 +0000
Subject: [PATCH] 修改内核路径
---
kernel/include/linux/devfreq.h | 220 ++++++++++++++++++++++++++-----------------------------
1 files changed, 104 insertions(+), 116 deletions(-)
diff --git a/kernel/include/linux/devfreq.h b/kernel/include/linux/devfreq.h
index 450130f..121a243 100644
--- a/kernel/include/linux/devfreq.h
+++ b/kernel/include/linux/devfreq.h
@@ -1,13 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* devfreq: Generic Dynamic Voltage and Frequency Scaling (DVFS) Framework
* for Non-CPU Devices.
*
* Copyright (C) 2011 Samsung Electronics
* MyungJoo Ham <myungjoo.ham@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#ifndef __LINUX_DEVFREQ_H__
@@ -16,6 +13,7 @@
#include <linux/device.h>
#include <linux/notifier.h>
#include <linux/pm_opp.h>
+#include <linux/pm_qos.h>
#define DEVFREQ_NAME_LEN 16
@@ -28,14 +26,17 @@
/* DEVFREQ notifier interface */
#define DEVFREQ_TRANSITION_NOTIFIER (0)
-#define DEVFREQ_POLICY_NOTIFIER (1)
/* Transition notifiers of DEVFREQ_TRANSITION_NOTIFIER */
#define DEVFREQ_PRECHANGE (0)
#define DEVFREQ_POSTCHANGE (1)
-/* Policy Notifiers */
-#define DEVFREQ_ADJUST (0)
+/* DEVFREQ work timers */
+enum devfreq_timer {
+ DEVFREQ_TIMER_DEFERRABLE = 0,
+ DEVFREQ_TIMER_DELAYED,
+ DEVFREQ_TIMER_NUM,
+};
struct devfreq;
struct devfreq_governor;
@@ -49,7 +50,6 @@
* @busy_time: The time that the device was working among the
* total_time.
* @current_frequency: The operating frequency.
- * @update: Whether need to update total_time and busy_time.
* @private_data: An entry not specified by the devfreq framework.
* A device and a specific governor may have their
* own protocol with private_data. However, because
@@ -61,7 +61,6 @@
unsigned long total_time;
unsigned long busy_time;
unsigned long current_frequency;
- bool update;
void *private_data;
};
@@ -78,6 +77,7 @@
* @initial_freq: The operating frequency when devfreq_add_device() is
* called.
* @polling_ms: The polling interval in ms. 0 disables polling.
+ * @timer: Timer type is either deferrable or delayed timer.
* @target: The device should set its operating frequency at
* freq or lowest-upper-than-freq value. If freq is
* higher than any operable frequency, set maximum.
@@ -104,6 +104,7 @@
struct devfreq_dev_profile {
unsigned long initial_freq;
unsigned int polling_ms;
+ enum devfreq_timer timer;
int (*target)(struct device *dev, unsigned long *freq, u32 flags);
int (*get_dev_status)(struct device *dev,
@@ -116,13 +117,17 @@
};
/**
- * struct devfreq_policy - Devfreq frequency limits
- * @min_: minimum frequency (adjustable by policy notifiers)
- * @max: maximum frequency (adjustable by policy notifiers)
+ * struct devfreq_stats - Statistics of devfreq device behavior
+ * @total_trans: Number of devfreq transitions.
+ * @trans_table: Statistics of devfreq transitions.
+ * @time_in_state: Statistics of devfreq states.
+ * @last_update: The last time stats were updated.
*/
-struct devfreq_policy {
- unsigned long min;
- unsigned long max;
+struct devfreq_stats {
+ unsigned int total_trans;
+ unsigned int *trans_table;
+ u64 *time_in_state;
+ u64 last_update;
};
/**
@@ -140,34 +145,34 @@
* devfreq.nb to the corresponding register notifier call chain.
* @work: delayed work for load monitoring.
* @previous_freq: previously configured frequency value.
+ * @last_status: devfreq user device info, performance statistics
* @data: Private data of the governor. The devfreq framework does not
* touch this.
- * @policy: Frequency limits of the device
- * @min_freq: Limit minimum frequency requested by user (0: none)
- * @max_freq: Limit maximum frequency requested by user (0: none)
+ * @user_min_freq_req: PM QoS minimum frequency request from user (via sysfs)
+ * @user_max_freq_req: PM QoS maximum frequency request from user (via sysfs)
* @scaling_min_freq: Limit minimum frequency requested by OPP interface
* @scaling_max_freq: Limit maximum frequency requested by OPP interface
* @stop_polling: devfreq polling status of a device.
- * @total_trans: Number of devfreq transitions
- * @trans_table: Statistics of devfreq transitions
- * @time_in_state: Statistics of devfreq states
- * @last_stat_updated: The last time stat updated
+ * @suspend_freq: frequency of a device set during suspend phase.
+ * @resume_freq: frequency of a device set in resume phase.
+ * @suspend_count: suspend requests counter for a device.
+ * @stats: Statistics of devfreq device behavior
* @transition_notifier_list: list head of DEVFREQ_TRANSITION_NOTIFIER notifier
- * @policy_notifier_list: list head of DEVFREQ_POLICY_NOTIFIER notifier
+ * @nb_min: Notifier block for DEV_PM_QOS_MIN_FREQUENCY
+ * @nb_max: Notifier block for DEV_PM_QOS_MAX_FREQUENCY
*
- * This structure stores the devfreq information for a give device.
+ * This structure stores the devfreq information for a given device.
*
* Note that when a governor accesses entries in struct devfreq in its
* functions except for the context of callbacks defined in struct
* devfreq_governor, the governor should protect its access with the
* struct mutex lock in struct devfreq. A governor may use this mutex
- * to protect its own private data in void *data as well.
+ * to protect its own private data in ``void *data`` as well.
*/
struct devfreq {
struct list_head node;
struct mutex lock;
- struct mutex event_lock;
struct device dev;
struct devfreq_dev_profile *profile;
const struct devfreq_governor *governor;
@@ -180,22 +185,23 @@
void *data; /* private data for governors */
- struct devfreq_policy policy;
-
- unsigned long min_freq;
- unsigned long max_freq;
+ struct dev_pm_qos_request user_min_freq_req;
+ struct dev_pm_qos_request user_max_freq_req;
unsigned long scaling_min_freq;
unsigned long scaling_max_freq;
bool stop_polling;
- /* information for device frequency transition */
- unsigned int total_trans;
- unsigned int *trans_table;
- unsigned long *time_in_state;
- unsigned long last_stat_updated;
+ unsigned long suspend_freq;
+ unsigned long resume_freq;
+ atomic_t suspend_count;
+
+ /* information for device frequency transitions */
+ struct devfreq_stats stats;
struct srcu_notifier_head transition_notifier_list;
- struct srcu_notifier_head policy_notifier_list;
+
+ struct notifier_block nb_min;
+ struct notifier_block nb_max;
};
struct devfreq_freqs {
@@ -204,76 +210,59 @@
};
#if defined(CONFIG_PM_DEVFREQ)
-extern struct devfreq *devfreq_add_device(struct device *dev,
- struct devfreq_dev_profile *profile,
- const char *governor_name,
- void *data);
-extern int devfreq_remove_device(struct devfreq *devfreq);
-extern struct devfreq *devm_devfreq_add_device(struct device *dev,
- struct devfreq_dev_profile *profile,
- const char *governor_name,
- void *data);
-extern void devm_devfreq_remove_device(struct device *dev,
- struct devfreq *devfreq);
+struct devfreq *devfreq_add_device(struct device *dev,
+ struct devfreq_dev_profile *profile,
+ const char *governor_name,
+ void *data);
+int devfreq_remove_device(struct devfreq *devfreq);
+struct devfreq *devm_devfreq_add_device(struct device *dev,
+ struct devfreq_dev_profile *profile,
+ const char *governor_name,
+ void *data);
+void devm_devfreq_remove_device(struct device *dev, struct devfreq *devfreq);
/* Supposed to be called by PM callbacks */
-extern int devfreq_suspend_device(struct devfreq *devfreq);
-extern int devfreq_resume_device(struct devfreq *devfreq);
+int devfreq_suspend_device(struct devfreq *devfreq);
+int devfreq_resume_device(struct devfreq *devfreq);
+
+void devfreq_suspend(void);
+void devfreq_resume(void);
+
+/* update_devfreq() - Reevaluate the device and configure frequency */
+int update_devfreq(struct devfreq *devfreq);
/* Helper functions for devfreq user device driver with OPP. */
-extern struct dev_pm_opp *devfreq_recommended_opp(struct device *dev,
- unsigned long *freq, u32 flags);
-extern int devfreq_register_opp_notifier(struct device *dev,
- struct devfreq *devfreq);
-extern int devfreq_unregister_opp_notifier(struct device *dev,
- struct devfreq *devfreq);
-extern int devm_devfreq_register_opp_notifier(struct device *dev,
- struct devfreq *devfreq);
-extern void devm_devfreq_unregister_opp_notifier(struct device *dev,
- struct devfreq *devfreq);
-extern int devfreq_register_notifier(struct devfreq *devfreq,
- struct notifier_block *nb,
- unsigned int list);
-extern int devfreq_unregister_notifier(struct devfreq *devfreq,
- struct notifier_block *nb,
- unsigned int list);
-extern int devm_devfreq_register_notifier(struct device *dev,
+struct dev_pm_opp *devfreq_recommended_opp(struct device *dev,
+ unsigned long *freq, u32 flags);
+int devfreq_register_opp_notifier(struct device *dev,
+ struct devfreq *devfreq);
+int devfreq_unregister_opp_notifier(struct device *dev,
+ struct devfreq *devfreq);
+int devm_devfreq_register_opp_notifier(struct device *dev,
+ struct devfreq *devfreq);
+void devm_devfreq_unregister_opp_notifier(struct device *dev,
+ struct devfreq *devfreq);
+int devfreq_register_notifier(struct devfreq *devfreq,
+ struct notifier_block *nb,
+ unsigned int list);
+int devfreq_unregister_notifier(struct devfreq *devfreq,
+ struct notifier_block *nb,
+ unsigned int list);
+int devm_devfreq_register_notifier(struct device *dev,
struct devfreq *devfreq,
struct notifier_block *nb,
unsigned int list);
-extern void devm_devfreq_unregister_notifier(struct device *dev,
+void devm_devfreq_unregister_notifier(struct device *dev,
struct devfreq *devfreq,
struct notifier_block *nb,
unsigned int list);
-extern struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev,
- int index);
-
-/**
- * devfreq_verify_within_limits() - Adjust a devfreq policy if needed to make
- * sure its min/max values are within a
- * specified range.
- * @policy: the policy
- * @min: the minimum frequency
- * @max: the maximum frequency
- */
-static inline void devfreq_verify_within_limits(struct devfreq_policy *policy,
- unsigned int min, unsigned int max)
-{
- if (policy->min < min)
- policy->min = min;
- if (policy->max < min)
- policy->max = min;
- if (policy->min > max)
- policy->min = max;
- if (policy->max > max)
- policy->max = max;
- if (policy->min > policy->max)
- policy->min = policy->max;
-}
+struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node);
+struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev,
+ const char *phandle_name, int index);
#if IS_ENABLED(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND)
/**
- * struct devfreq_simple_ondemand_data - void *data fed to struct devfreq
+ * struct devfreq_simple_ondemand_data - ``void *data`` fed to struct devfreq
* and devfreq_add_device
* @upthreshold: If the load is over this value, the frequency jumps.
* Specify 0 to use the default. Valid value = 0 to 100.
@@ -281,9 +270,6 @@
* the governor may consider slowing the frequency down.
* Specify 0 to use the default. Valid value = 0 to 100.
* downdifferential < upthreshold must hold.
- * @simple_scaling: Setting this flag will scale the clocks up only if the
- * load is above @upthreshold and will scale the clocks
- * down only if the load is below @downdifferential.
*
* If the fed devfreq_simple_ondemand_data pointer is NULL to the governor,
* the governor uses the default values.
@@ -291,13 +277,12 @@
struct devfreq_simple_ondemand_data {
unsigned int upthreshold;
unsigned int downdifferential;
- unsigned int simple_scaling;
};
#endif
#if IS_ENABLED(CONFIG_DEVFREQ_GOV_PASSIVE)
/**
- * struct devfreq_passive_data - void *data fed to struct devfreq
+ * struct devfreq_passive_data - ``void *data`` fed to struct devfreq
* and devfreq_add_device
* @parent: the devfreq instance of parent device.
* @get_target_freq: Optional callback, Returns desired operating frequency
@@ -330,9 +315,9 @@
#else /* !CONFIG_PM_DEVFREQ */
static inline struct devfreq *devfreq_add_device(struct device *dev,
- struct devfreq_dev_profile *profile,
- const char *governor_name,
- void *data)
+ struct devfreq_dev_profile *profile,
+ const char *governor_name,
+ void *data)
{
return ERR_PTR(-ENOSYS);
}
@@ -365,32 +350,35 @@
return 0;
}
+static inline void devfreq_suspend(void) {}
+static inline void devfreq_resume(void) {}
+
static inline struct dev_pm_opp *devfreq_recommended_opp(struct device *dev,
- unsigned long *freq, u32 flags)
+ unsigned long *freq, u32 flags)
{
return ERR_PTR(-EINVAL);
}
static inline int devfreq_register_opp_notifier(struct device *dev,
- struct devfreq *devfreq)
+ struct devfreq *devfreq)
{
return -EINVAL;
}
static inline int devfreq_unregister_opp_notifier(struct device *dev,
- struct devfreq *devfreq)
+ struct devfreq *devfreq)
{
return -EINVAL;
}
static inline int devm_devfreq_register_opp_notifier(struct device *dev,
- struct devfreq *devfreq)
+ struct devfreq *devfreq)
{
return -EINVAL;
}
static inline void devm_devfreq_unregister_opp_notifier(struct device *dev,
- struct devfreq *devfreq)
+ struct devfreq *devfreq)
{
}
@@ -409,29 +397,29 @@
}
static inline int devm_devfreq_register_notifier(struct device *dev,
- struct devfreq *devfreq,
- struct notifier_block *nb,
- unsigned int list)
+ struct devfreq *devfreq,
+ struct notifier_block *nb,
+ unsigned int list)
{
return 0;
}
static inline void devm_devfreq_unregister_notifier(struct device *dev,
- struct devfreq *devfreq,
- struct notifier_block *nb,
- unsigned int list)
+ struct devfreq *devfreq,
+ struct notifier_block *nb,
+ unsigned int list)
{
}
-static inline struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev,
- int index)
+static inline struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node)
{
return ERR_PTR(-ENODEV);
}
-static inline void devfreq_verify_within_limits(struct devfreq_policy *policy,
- unsigned int min, unsigned int max)
+static inline struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev,
+ const char *phandle_name, int index)
{
+ return ERR_PTR(-ENODEV);
}
static inline int devfreq_update_stats(struct devfreq *df)
--
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