From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/include/linux/pm_domain.h | 176 ++++++++++++++++++++++++++++++++++++++++++++++------------
1 files changed, 139 insertions(+), 37 deletions(-)
diff --git a/kernel/include/linux/pm_domain.h b/kernel/include/linux/pm_domain.h
index 0970e3f..ca060c3 100644
--- a/kernel/include/linux/pm_domain.h
+++ b/kernel/include/linux/pm_domain.h
@@ -1,31 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* pm_domain.h - Definitions and headers related to device power domains.
*
* Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
- *
- * This file is released under the GPLv2.
*/
#ifndef _LINUX_PM_DOMAIN_H
#define _LINUX_PM_DOMAIN_H
#include <linux/device.h>
+#include <linux/ktime.h>
#include <linux/mutex.h>
#include <linux/pm.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/notifier.h>
#include <linux/spinlock.h>
+#include <linux/cpumask.h>
-/* Defines used for the flags field in the struct generic_pm_domain */
-#define GENPD_FLAG_PM_CLK (1U << 0) /* PM domain uses PM clk */
-#define GENPD_FLAG_IRQ_SAFE (1U << 1) /* PM domain operates in atomic */
-#define GENPD_FLAG_ALWAYS_ON (1U << 2) /* PM domain is always powered on */
-#define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3) /* Keep devices active if wakeup */
+/*
+ * Flags to control the behaviour of a genpd.
+ *
+ * These flags may be set in the struct generic_pm_domain's flags field by a
+ * genpd backend driver. The flags must be set before it calls pm_genpd_init(),
+ * which initializes a genpd.
+ *
+ * GENPD_FLAG_PM_CLK: Instructs genpd to use the PM clk framework,
+ * while powering on/off attached devices.
+ *
+ * GENPD_FLAG_IRQ_SAFE: This informs genpd that its backend callbacks,
+ * ->power_on|off(), doesn't sleep. Hence, these
+ * can be invoked from within atomic context, which
+ * enables genpd to power on/off the PM domain,
+ * even when pm_runtime_is_irq_safe() returns true,
+ * for any of its attached devices. Note that, a
+ * genpd having this flag set, requires its
+ * masterdomains to also have it set.
+ *
+ * GENPD_FLAG_ALWAYS_ON: Instructs genpd to always keep the PM domain
+ * powered on.
+ *
+ * GENPD_FLAG_ACTIVE_WAKEUP: Instructs genpd to keep the PM domain powered
+ * on, in case any of its attached devices is used
+ * in the wakeup path to serve system wakeups.
+ *
+ * GENPD_FLAG_CPU_DOMAIN: Instructs genpd that it should expect to get
+ * devices attached, which may belong to CPUs or
+ * possibly have subdomains with CPUs attached.
+ * This flag enables the genpd backend driver to
+ * deploy idle power management support for CPUs
+ * and groups of CPUs. Note that, the backend
+ * driver must then comply with the so called,
+ * last-man-standing algorithm, for the CPUs in the
+ * PM domain.
+ *
+ * GENPD_FLAG_RPM_ALWAYS_ON: Instructs genpd to always keep the PM domain
+ * powered on except for system suspend.
+ *
+ * GENPD_FLAG_MIN_RESIDENCY: Enable the genpd governor to consider its
+ * components' next wakeup when determining the
+ * optimal idle state.
+ */
+#define GENPD_FLAG_PM_CLK (1U << 0)
+#define GENPD_FLAG_IRQ_SAFE (1U << 1)
+#define GENPD_FLAG_ALWAYS_ON (1U << 2)
+#define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3)
+#define GENPD_FLAG_CPU_DOMAIN (1U << 4)
+#define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5)
+#define GENPD_FLAG_MIN_RESIDENCY (1U << 6)
enum gpd_status {
- GPD_STATE_ACTIVE = 0, /* PM domain is active */
- GPD_STATE_POWER_OFF, /* PM domain is off */
+ GENPD_STATE_ON = 0, /* PM domain is on */
+ GENPD_STATE_OFF, /* PM domain is off */
+};
+
+enum genpd_notication {
+ GENPD_NOTIFY_PRE_OFF = 0,
+ GENPD_NOTIFY_OFF,
+ GENPD_NOTIFY_PRE_ON,
+ GENPD_NOTIFY_ON,
};
struct dev_power_governor {
@@ -42,19 +95,23 @@
s64 power_off_latency_ns;
s64 power_on_latency_ns;
s64 residency_ns;
+ u64 usage;
+ u64 rejected;
struct fwnode_handle *fwnode;
ktime_t idle_time;
+ void *data;
};
struct genpd_lock_ops;
struct dev_pm_opp;
+struct opp_table;
struct generic_pm_domain {
struct device dev;
struct dev_pm_domain domain; /* PM domain operations */
struct list_head gpd_list_node; /* Node in the global PM domains list */
- struct list_head master_links; /* Links with PM domain as a master */
- struct list_head slave_links; /* Links with PM domain as a slave */
+ struct list_head parent_links; /* Links with PM domain as a parent */
+ struct list_head child_links; /* Links with PM domain as a child */
struct list_head dev_list; /* List of devices */
struct dev_power_governor *gov;
struct work_struct power_off_work;
@@ -67,26 +124,31 @@
unsigned int suspended_count; /* System suspend device counter */
unsigned int prepared_count; /* Suspend counter of prepared devices */
unsigned int performance_state; /* Aggregated max performance state */
- bool suspend_power_off; /* Power status before system suspend */
+ cpumask_var_t cpus; /* A cpumask of the attached CPUs */
int (*power_off)(struct generic_pm_domain *domain);
int (*power_on)(struct generic_pm_domain *domain);
+ struct raw_notifier_head power_notifiers; /* Power on/off notifiers */
+ struct opp_table *opp_table; /* OPP table of the genpd */
unsigned int (*opp_to_performance_state)(struct generic_pm_domain *genpd,
struct dev_pm_opp *opp);
int (*set_performance_state)(struct generic_pm_domain *genpd,
unsigned int state);
struct gpd_dev_ops dev_ops;
s64 max_off_time_ns; /* Maximum allowed "suspended" time. */
+ ktime_t next_wakeup; /* Maintained by the domain governor */
bool max_off_time_changed;
bool cached_power_down_ok;
+ bool cached_power_down_state_idx;
int (*attach_dev)(struct generic_pm_domain *domain,
struct device *dev);
void (*detach_dev)(struct generic_pm_domain *domain,
struct device *dev);
unsigned int flags; /* Bit field of configs for genpd */
struct genpd_power_state *states;
+ void (*free_states)(struct genpd_power_state *states,
+ unsigned int state_count);
unsigned int state_count; /* number of states */
unsigned int state_idx; /* state that genpd will go to when off */
- void *free; /* Free the state that was allocated for default */
ktime_t on_time;
ktime_t accounting_time;
const struct genpd_lock_ops *lock_ops;
@@ -106,10 +168,14 @@
}
struct gpd_link {
- struct generic_pm_domain *master;
- struct list_head master_node;
- struct generic_pm_domain *slave;
- struct list_head slave_node;
+ struct generic_pm_domain *parent;
+ struct list_head parent_node;
+ struct generic_pm_domain *child;
+ struct list_head child_node;
+
+ /* Sub-domain's per-master domain performance state */
+ unsigned int performance_state;
+ unsigned int prev_performance_state;
};
struct gpd_timing_data {
@@ -129,7 +195,10 @@
struct pm_domain_data base;
struct gpd_timing_data td;
struct notifier_block nb;
+ struct notifier_block *power_nb;
+ int cpu;
unsigned int performance_state;
+ ktime_t next_wakeup;
void *data;
};
@@ -147,16 +216,22 @@
int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev);
int pm_genpd_remove_device(struct device *dev);
int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
- struct generic_pm_domain *new_subdomain);
+ struct generic_pm_domain *subdomain);
int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
- struct generic_pm_domain *target);
+ struct generic_pm_domain *subdomain);
int pm_genpd_init(struct generic_pm_domain *genpd,
struct dev_power_governor *gov, bool is_off);
int pm_genpd_remove(struct generic_pm_domain *genpd);
int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state);
+int dev_pm_genpd_add_notifier(struct device *dev, struct notifier_block *nb);
+int dev_pm_genpd_remove_notifier(struct device *dev);
+void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next);
extern struct dev_power_governor simple_qos_governor;
extern struct dev_power_governor pm_domain_always_on_gov;
+#ifdef CONFIG_CPU_IDLE
+extern struct dev_power_governor pm_domain_cpu_gov;
+#endif
#else
static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
@@ -173,12 +248,12 @@
return -ENOSYS;
}
static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
- struct generic_pm_domain *new_sd)
+ struct generic_pm_domain *subdomain)
{
return -ENOSYS;
}
static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
- struct generic_pm_domain *target)
+ struct generic_pm_domain *subdomain)
{
return -ENOSYS;
}
@@ -198,16 +273,30 @@
return -ENOTSUPP;
}
+static inline int dev_pm_genpd_add_notifier(struct device *dev,
+ struct notifier_block *nb)
+{
+ return -ENOTSUPP;
+}
+
+static inline int dev_pm_genpd_remove_notifier(struct device *dev)
+{
+ return -ENOTSUPP;
+}
+
+static inline void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next)
+{ }
+
#define simple_qos_governor (*(struct dev_power_governor *)(NULL))
#define pm_domain_always_on_gov (*(struct dev_power_governor *)(NULL))
#endif
#ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
-void pm_genpd_syscore_poweroff(struct device *dev);
-void pm_genpd_syscore_poweron(struct device *dev);
+void dev_pm_genpd_suspend(struct device *dev);
+void dev_pm_genpd_resume(struct device *dev);
#else
-static inline void pm_genpd_syscore_poweroff(struct device *dev) {}
-static inline void pm_genpd_syscore_poweron(struct device *dev) {}
+static inline void dev_pm_genpd_suspend(struct device *dev) {}
+static inline void dev_pm_genpd_resume(struct device *dev) {}
#endif
/* OF PM domain providers */
@@ -229,19 +318,21 @@
struct genpd_onecell_data *data);
void of_genpd_del_provider(struct device_node *np);
int of_genpd_add_device(struct of_phandle_args *args, struct device *dev);
-int of_genpd_add_subdomain(struct of_phandle_args *parent,
- struct of_phandle_args *new_subdomain);
+int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
+ struct of_phandle_args *subdomain_spec);
+int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec,
+ struct of_phandle_args *subdomain_spec);
struct generic_pm_domain *of_genpd_remove_last(struct device_node *np);
int of_genpd_parse_idle_states(struct device_node *dn,
struct genpd_power_state **states, int *n);
-unsigned int of_genpd_opp_to_performance_state(struct device *dev,
- struct device_node *np);
+unsigned int pm_genpd_opp_to_performance_state(struct device *genpd_dev,
+ struct dev_pm_opp *opp);
int genpd_dev_pm_attach(struct device *dev);
struct device *genpd_dev_pm_attach_by_id(struct device *dev,
unsigned int index);
struct device *genpd_dev_pm_attach_by_name(struct device *dev,
- char *name);
+ const char *name);
#else /* !CONFIG_PM_GENERIC_DOMAINS_OF */
static inline int of_genpd_add_provider_simple(struct device_node *np,
struct generic_pm_domain *genpd)
@@ -263,8 +354,14 @@
return -ENODEV;
}
-static inline int of_genpd_add_subdomain(struct of_phandle_args *parent,
- struct of_phandle_args *new_subdomain)
+static inline int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
+ struct of_phandle_args *subdomain_spec)
+{
+ return -ENODEV;
+}
+
+static inline int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec,
+ struct of_phandle_args *subdomain_spec)
{
return -ENODEV;
}
@@ -276,8 +373,8 @@
}
static inline unsigned int
-of_genpd_opp_to_performance_state(struct device *dev,
- struct device_node *np)
+pm_genpd_opp_to_performance_state(struct device *genpd_dev,
+ struct dev_pm_opp *opp)
{
return 0;
}
@@ -294,7 +391,7 @@
}
static inline struct device *genpd_dev_pm_attach_by_name(struct device *dev,
- char *name)
+ const char *name)
{
return NULL;
}
@@ -311,8 +408,9 @@
struct device *dev_pm_domain_attach_by_id(struct device *dev,
unsigned int index);
struct device *dev_pm_domain_attach_by_name(struct device *dev,
- char *name);
+ const char *name);
void dev_pm_domain_detach(struct device *dev, bool power_off);
+int dev_pm_domain_start(struct device *dev);
void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd);
#else
static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
@@ -325,11 +423,15 @@
return NULL;
}
static inline struct device *dev_pm_domain_attach_by_name(struct device *dev,
- char *name)
+ const char *name)
{
return NULL;
}
static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
+static inline int dev_pm_domain_start(struct device *dev)
+{
+ return 0;
+}
static inline void dev_pm_domain_set(struct device *dev,
struct dev_pm_domain *pd) {}
#endif
--
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