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Merge back earlier 'pm-domains' material for v4.4.

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This commit is contained in:
Rafael J. Wysocki 2015-10-16 22:12:57 +02:00
commit 88cfe5356a
3 changed files with 25 additions and 320 deletions
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280
drivers/base/power/domain.c
View File

@ -53,24 +53,6 @@
static LIST_HEAD(gpd_list);
static DEFINE_MUTEX(gpd_list_lock);
static struct generic_pm_domain *pm_genpd_lookup_name(const char *domain_name)
{
struct generic_pm_domain *genpd = NULL, *gpd;
if (IS_ERR_OR_NULL(domain_name))
return NULL;
mutex_lock(&gpd_list_lock);
list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
if (!strcmp(gpd->name, domain_name)) {
genpd = gpd;
break;
}
}
mutex_unlock(&gpd_list_lock);
return genpd;
}
/*
* Get the generic PM domain for a particular struct device.
* This validates the struct device pointer, the PM domain pointer,
@ -140,19 +122,6 @@ static void genpd_sd_counter_inc(struct generic_pm_domain *genpd)
smp_mb__after_atomic();
}
static void genpd_recalc_cpu_exit_latency(struct generic_pm_domain *genpd)
{
s64 usecs64;
if (!genpd->cpuidle_data)
return;
usecs64 = genpd->power_on_latency_ns;
do_div(usecs64, NSEC_PER_USEC);
usecs64 += genpd->cpuidle_data->saved_exit_latency;
genpd->cpuidle_data->idle_state->exit_latency = usecs64;
}
static int genpd_power_on(struct generic_pm_domain *genpd, bool timed)
{
ktime_t time_start;
@ -176,7 +145,6 @@ static int genpd_power_on(struct generic_pm_domain *genpd, bool timed)
genpd->power_on_latency_ns = elapsed_ns;
genpd->max_off_time_changed = true;
genpd_recalc_cpu_exit_latency(genpd);
pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n",
genpd->name, "on", elapsed_ns);
@ -213,10 +181,10 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool timed)
}
/**
* genpd_queue_power_off_work - Queue up the execution of pm_genpd_poweroff().
* genpd_queue_power_off_work - Queue up the execution of genpd_poweroff().
* @genpd: PM domait to power off.
*
* Queue up the execution of pm_genpd_poweroff() unless it's already been done
* Queue up the execution of genpd_poweroff() unless it's already been done
* before.
*/
static void genpd_queue_power_off_work(struct generic_pm_domain *genpd)
@ -224,14 +192,16 @@ static void genpd_queue_power_off_work(struct generic_pm_domain *genpd)
queue_work(pm_wq, &genpd->power_off_work);
}
static int genpd_poweron(struct generic_pm_domain *genpd);
/**
* __pm_genpd_poweron - Restore power to a given PM domain and its masters.
* __genpd_poweron - Restore power to a given PM domain and its masters.
* @genpd: PM domain to power up.
*
* Restore power to @genpd and all of its masters so that it is possible to
* resume a device belonging to it.
*/
static int __pm_genpd_poweron(struct generic_pm_domain *genpd)
static int __genpd_poweron(struct generic_pm_domain *genpd)
{
struct gpd_link *link;
int ret = 0;
@ -240,13 +210,6 @@ static int __pm_genpd_poweron(struct generic_pm_domain *genpd)
|| (genpd->prepared_count > 0 && genpd->suspend_power_off))
return 0;
if (genpd->cpuidle_data) {
cpuidle_pause_and_lock();
genpd->cpuidle_data->idle_state->disabled = true;
cpuidle_resume_and_unlock();
goto out;
}
/*
* The list is guaranteed not to change while the loop below is being
* executed, unless one of the masters' .power_on() callbacks fiddles
@ -255,7 +218,7 @@ static int __pm_genpd_poweron(struct generic_pm_domain *genpd)
list_for_each_entry(link, &genpd->slave_links, slave_node) {
genpd_sd_counter_inc(link->master);
ret = pm_genpd_poweron(link->master);
ret = genpd_poweron(link->master);
if (ret) {
genpd_sd_counter_dec(link->master);
goto err;
@ -266,7 +229,6 @@ static int __pm_genpd_poweron(struct generic_pm_domain *genpd)
if (ret)
goto err;
out:
genpd->status = GPD_STATE_ACTIVE;
return 0;
@ -282,31 +244,19 @@ static int __pm_genpd_poweron(struct generic_pm_domain *genpd)
}
/**
* pm_genpd_poweron - Restore power to a given PM domain and its masters.
* genpd_poweron - Restore power to a given PM domain and its masters.
* @genpd: PM domain to power up.
*/
int pm_genpd_poweron(struct generic_pm_domain *genpd)
static int genpd_poweron(struct generic_pm_domain *genpd)
{
int ret;
mutex_lock(&genpd->lock);
ret = __pm_genpd_poweron(genpd);
ret = __genpd_poweron(genpd);
mutex_unlock(&genpd->lock);
return ret;
}
/**
* pm_genpd_name_poweron - Restore power to a given PM domain and its masters.
* @domain_name: Name of the PM domain to power up.
*/
int pm_genpd_name_poweron(const char *domain_name)
{
struct generic_pm_domain *genpd;
genpd = pm_genpd_lookup_name(domain_name);
return genpd ? pm_genpd_poweron(genpd) : -EINVAL;
}
static int genpd_save_dev(struct generic_pm_domain *genpd, struct device *dev)
{
return GENPD_DEV_TIMED_CALLBACK(genpd, int, save_state, dev,
@ -365,13 +315,14 @@ static int genpd_dev_pm_qos_notifier(struct notifier_block *nb,
}
/**
* pm_genpd_poweroff - Remove power from a given PM domain.
* genpd_poweroff - Remove power from a given PM domain.
* @genpd: PM domain to power down.
* @is_async: PM domain is powered down from a scheduled work
*
* If all of the @genpd's devices have been suspended and all of its subdomains
* have been powered down, remove power from @genpd.
*/
static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
static int genpd_poweroff(struct generic_pm_domain *genpd, bool is_async)
{
struct pm_domain_data *pdd;
struct gpd_link *link;
@ -403,7 +354,7 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
not_suspended++;
}
if (not_suspended > genpd->in_progress)
if (not_suspended > 1 || (not_suspended == 1 && is_async))
return -EBUSY;
if (genpd->gov && genpd->gov->power_down_ok) {
@ -411,21 +362,6 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
return -EAGAIN;
}
if (genpd->cpuidle_data) {
/*
* If cpuidle_data is set, cpuidle should turn the domain off
* when the CPU in it is idle. In that case we don't decrement
* the subdomain counts of the master domains, so that power is
* not removed from the current domain prematurely as a result
* of cutting off the masters' power.
*/
genpd->status = GPD_STATE_POWER_OFF;
cpuidle_pause_and_lock();
genpd->cpuidle_data->idle_state->disabled = false;
cpuidle_resume_and_unlock();
return 0;
}
if (genpd->power_off) {
int ret;
@ -434,10 +370,10 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
/*
* If sd_count > 0 at this point, one of the subdomains hasn't
* managed to call pm_genpd_poweron() for the master yet after
* incrementing it. In that case pm_genpd_poweron() will wait
* managed to call genpd_poweron() for the master yet after
* incrementing it. In that case genpd_poweron() will wait
* for us to drop the lock, so we can call .power_off() and let
* the pm_genpd_poweron() restore power for us (this shouldn't
* the genpd_poweron() restore power for us (this shouldn't
* happen very often).
*/
ret = genpd_power_off(genpd, true);
@ -466,7 +402,7 @@ static void genpd_power_off_work_fn(struct work_struct *work)
genpd = container_of(work, struct generic_pm_domain, power_off_work);
mutex_lock(&genpd->lock);
pm_genpd_poweroff(genpd);
genpd_poweroff(genpd, true);
mutex_unlock(&genpd->lock);
}
@ -512,9 +448,7 @@ static int pm_genpd_runtime_suspend(struct device *dev)
return 0;
mutex_lock(&genpd->lock);
genpd->in_progress++;
pm_genpd_poweroff(genpd);
genpd->in_progress--;
genpd_poweroff(genpd, false);
mutex_unlock(&genpd->lock);
return 0;
@ -547,7 +481,7 @@ static int pm_genpd_runtime_resume(struct device *dev)
}
mutex_lock(&genpd->lock);
ret = __pm_genpd_poweron(genpd);
ret = __genpd_poweron(genpd);
mutex_unlock(&genpd->lock);
if (ret)
@ -569,15 +503,15 @@ static int __init pd_ignore_unused_setup(char *__unused)
__setup("pd_ignore_unused", pd_ignore_unused_setup);
/**
* pm_genpd_poweroff_unused - Power off all PM domains with no devices in use.
* genpd_poweroff_unused - Power off all PM domains with no devices in use.
*/
void pm_genpd_poweroff_unused(void)
static int __init genpd_poweroff_unused(void)
{
struct generic_pm_domain *genpd;
if (pd_ignore_unused) {
pr_warn("genpd: Not disabling unused power domains\n");
return;
return 0;
}
mutex_lock(&gpd_list_lock);
@ -586,11 +520,7 @@ void pm_genpd_poweroff_unused(void)
genpd_queue_power_off_work(genpd);
mutex_unlock(&gpd_list_lock);
}
static int __init genpd_poweroff_unused(void)
{
pm_genpd_poweroff_unused();
return 0;
}
late_initcall(genpd_poweroff_unused);
@ -764,7 +694,7 @@ static int pm_genpd_prepare(struct device *dev)
/*
* The PM domain must be in the GPD_STATE_ACTIVE state at this point,
* so pm_genpd_poweron() will return immediately, but if the device
* so genpd_poweron() will return immediately, but if the device
* is suspended (e.g. it's been stopped by genpd_stop_dev()), we need
* to make it operational.
*/
@ -1316,18 +1246,6 @@ int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
return ret;
}
/**
* __pm_genpd_name_add_device - Find I/O PM domain and add a device to it.
* @domain_name: Name of the PM domain to add the device to.
* @dev: Device to be added.
* @td: Set of PM QoS timing parameters to attach to the device.
*/
int __pm_genpd_name_add_device(const char *domain_name, struct device *dev,
struct gpd_timing_data *td)
{
return __pm_genpd_add_device(pm_genpd_lookup_name(domain_name), dev, td);
}
/**
* pm_genpd_remove_device - Remove a device from an I/O PM domain.
* @genpd: PM domain to remove the device from.
@ -1428,35 +1346,6 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
return ret;
}
/**
* pm_genpd_add_subdomain_names - Add a subdomain to an I/O PM domain.
* @master_name: Name of the master PM domain to add the subdomain to.
* @subdomain_name: Name of the subdomain to be added.
*/
int pm_genpd_add_subdomain_names(const char *master_name,
const char *subdomain_name)
{
struct generic_pm_domain *master = NULL, *subdomain = NULL, *gpd;
if (IS_ERR_OR_NULL(master_name) || IS_ERR_OR_NULL(subdomain_name))
return -EINVAL;
mutex_lock(&gpd_list_lock);
list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
if (!master && !strcmp(gpd->name, master_name))
master = gpd;
if (!subdomain && !strcmp(gpd->name, subdomain_name))
subdomain = gpd;
if (master && subdomain)
break;
}
mutex_unlock(&gpd_list_lock);
return pm_genpd_add_subdomain(master, subdomain);
}
/**
* pm_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain.
* @genpd: Master PM domain to remove the subdomain from.
@ -1504,124 +1393,6 @@ out:
return ret;
}
/**
* pm_genpd_attach_cpuidle - Connect the given PM domain with cpuidle.
* @genpd: PM domain to be connected with cpuidle.
* @state: cpuidle state this domain can disable/enable.
*
* Make a PM domain behave as though it contained a CPU core, that is, instead
* of calling its power down routine it will enable the given cpuidle state so
* that the cpuidle subsystem can power it down (if possible and desirable).
*/
int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state)
{
struct cpuidle_driver *cpuidle_drv;
struct gpd_cpuidle_data *cpuidle_data;
struct cpuidle_state *idle_state;
int ret = 0;
if (IS_ERR_OR_NULL(genpd) || state < 0)
return -EINVAL;
mutex_lock(&genpd->lock);
if (genpd->cpuidle_data) {
ret = -EEXIST;
goto out;
}
cpuidle_data = kzalloc(sizeof(*cpuidle_data), GFP_KERNEL);
if (!cpuidle_data) {
ret = -ENOMEM;
goto out;
}
cpuidle_drv = cpuidle_driver_ref();
if (!cpuidle_drv) {
ret = -ENODEV;
goto err_drv;
}
if (cpuidle_drv->state_count <= state) {
ret = -EINVAL;
goto err;
}
idle_state = &cpuidle_drv->states[state];
if (!idle_state->disabled) {
ret = -EAGAIN;
goto err;
}
cpuidle_data->idle_state = idle_state;
cpuidle_data->saved_exit_latency = idle_state->exit_latency;
genpd->cpuidle_data = cpuidle_data;
genpd_recalc_cpu_exit_latency(genpd);
out:
mutex_unlock(&genpd->lock);
return ret;
err:
cpuidle_driver_unref();
err_drv:
kfree(cpuidle_data);
goto out;
}
/**
* pm_genpd_name_attach_cpuidle - Find PM domain and connect cpuidle to it.
* @name: Name of the domain to connect to cpuidle.
* @state: cpuidle state this domain can manipulate.
*/
int pm_genpd_name_attach_cpuidle(const char *name, int state)
{
return pm_genpd_attach_cpuidle(pm_genpd_lookup_name(name), state);
}
/**
* pm_genpd_detach_cpuidle - Remove the cpuidle connection from a PM domain.
* @genpd: PM domain to remove the cpuidle connection from.
*
* Remove the cpuidle connection set up by pm_genpd_attach_cpuidle() from the
* given PM domain.
*/
int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd)
{
struct gpd_cpuidle_data *cpuidle_data;
struct cpuidle_state *idle_state;
int ret = 0;
if (IS_ERR_OR_NULL(genpd))
return -EINVAL;
mutex_lock(&genpd->lock);
cpuidle_data = genpd->cpuidle_data;
if (!cpuidle_data) {
ret = -ENODEV;
goto out;
}
idle_state = cpuidle_data->idle_state;
if (!idle_state->disabled) {
ret = -EAGAIN;
goto out;
}
idle_state->exit_latency = cpuidle_data->saved_exit_latency;
cpuidle_driver_unref();
genpd->cpuidle_data = NULL;
kfree(cpuidle_data);
out:
mutex_unlock(&genpd->lock);
return ret;
}
/**
* pm_genpd_name_detach_cpuidle - Find PM domain and disconnect cpuidle from it.
* @name: Name of the domain to disconnect cpuidle from.
*/
int pm_genpd_name_detach_cpuidle(const char *name)
{
return pm_genpd_detach_cpuidle(pm_genpd_lookup_name(name));
}
/* Default device callbacks for generic PM domains. */
/**
@ -1688,7 +1459,6 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
mutex_init(&genpd->lock);
genpd->gov = gov;
INIT_WORK(&genpd->power_off_work, genpd_power_off_work_fn);
genpd->in_progress = 0;
atomic_set(&genpd->sd_count, 0);
genpd->status = is_off ? GPD_STATE_POWER_OFF : GPD_STATE_ACTIVE;
genpd->device_count = 0;
@ -2023,7 +1793,7 @@ int genpd_dev_pm_attach(struct device *dev)
dev->pm_domain->detach = genpd_dev_pm_detach;
dev->pm_domain->sync = genpd_dev_pm_sync;
ret = pm_genpd_poweron(pd);
ret = genpd_poweron(pd);
out:
return ret ? -EPROBE_DEFER : 0;

1
drivers/soc/dove/pmu.c
View File

@ -396,7 +396,6 @@ int __init dove_init_pmu(void)
__pmu_domain_register(domain, np);
}
pm_genpd_poweroff_unused();
/* Loss of the interrupt controller is not a fatal error. */
parent_irq = irq_of_parse_and_map(pmu->of_node, 0);

64
include/linux/pm_domain.h
View File

@ -15,7 +15,6 @@
#include <linux/err.h>
#include <linux/of.h>
#include <linux/notifier.h>
#include <linux/cpuidle.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 */
@ -38,11 +37,6 @@ struct gpd_dev_ops {
bool (*active_wakeup)(struct device *dev);
};
struct gpd_cpuidle_data {
unsigned int saved_exit_latency;
struct cpuidle_state *idle_state;
};
struct generic_pm_domain {
struct dev_pm_domain domain; /* PM domain operations */
struct list_head gpd_list_node; /* Node in the global PM domains list */
@ -53,7 +47,6 @@ struct generic_pm_domain {
struct dev_power_governor *gov;
struct work_struct power_off_work;
const char *name;
unsigned int in_progress; /* Number of devices being suspended now */
atomic_t sd_count; /* Number of subdomains with power "on" */
enum gpd_status status; /* Current state of the domain */
unsigned int device_count; /* Number of devices */
@ -68,7 +61,6 @@ struct generic_pm_domain {
s64 max_off_time_ns; /* Maximum allowed "suspended" time. */
bool max_off_time_changed;
bool cached_power_down_ok;
struct gpd_cpuidle_data *cpuidle_data;
int (*attach_dev)(struct generic_pm_domain *domain,
struct device *dev);
void (*detach_dev)(struct generic_pm_domain *domain,
@ -125,29 +117,15 @@ extern int __pm_genpd_add_device(struct generic_pm_domain *genpd,
struct device *dev,
struct gpd_timing_data *td);
extern int __pm_genpd_name_add_device(const char *domain_name,
struct device *dev,
struct gpd_timing_data *td);
extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
struct device *dev);
extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
struct generic_pm_domain *new_subdomain);
extern int pm_genpd_add_subdomain_names(const char *master_name,
const char *subdomain_name);
extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
struct generic_pm_domain *target);
extern int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state);
extern int pm_genpd_name_attach_cpuidle(const char *name, int state);
extern int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd);
extern int pm_genpd_name_detach_cpuidle(const char *name);
extern void pm_genpd_init(struct generic_pm_domain *genpd,
struct dev_power_governor *gov, bool is_off);
extern int pm_genpd_poweron(struct generic_pm_domain *genpd);
extern int pm_genpd_name_poweron(const char *domain_name);
extern void pm_genpd_poweroff_unused(void);
extern struct dev_power_governor simple_qos_governor;
extern struct dev_power_governor pm_domain_always_on_gov;
#else
@ -166,12 +144,6 @@ static inline int __pm_genpd_add_device(struct generic_pm_domain *genpd,
{
return -ENOSYS;
}
static inline int __pm_genpd_name_add_device(const char *domain_name,
struct device *dev,
struct gpd_timing_data *td)
{
return -ENOSYS;
}
static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd,
struct device *dev)
{
@ -182,45 +154,15 @@ static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
{
return -ENOSYS;
}
static inline int pm_genpd_add_subdomain_names(const char *master_name,
const char *subdomain_name)
{
return -ENOSYS;
}
static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
struct generic_pm_domain *target)
{
return -ENOSYS;
}
static inline int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int st)
{
return -ENOSYS;
}
static inline int pm_genpd_name_attach_cpuidle(const char *name, int state)
{
return -ENOSYS;
}
static inline int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd)
{
return -ENOSYS;
}
static inline int pm_genpd_name_detach_cpuidle(const char *name)
{
return -ENOSYS;
}
static inline void pm_genpd_init(struct generic_pm_domain *genpd,
struct dev_power_governor *gov, bool is_off)
{
}
static inline int pm_genpd_poweron(struct generic_pm_domain *genpd)
{
return -ENOSYS;
}
static inline int pm_genpd_name_poweron(const char *domain_name)
{
return -ENOSYS;
}
static inline void pm_genpd_poweroff_unused(void) {}
#endif
static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
@ -229,12 +171,6 @@ static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
return __pm_genpd_add_device(genpd, dev, NULL);
}
static inline int pm_genpd_name_add_device(const char *domain_name,
struct device *dev)
{
return __pm_genpd_name_add_device(domain_name, dev, NULL);
}
#ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
extern void pm_genpd_syscore_poweroff(struct device *dev);
extern void pm_genpd_syscore_poweron(struct device *dev);