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PM: domains: Allocate governor data dynamically based on a genpd governor

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If a genpd doesn't have an associated governor assigned, several variables
in the struct generic_pm_domain becomes superfluous.

Rather than wasting memory in allocated genpds, let's move the variables
from the struct generic_pm_domain into a new separate struct. In this way,
we can instead dynamically decide when we need to allocate the
corresponding data for it.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson 2022-05-11 16:57:02 +02:00 • committed by Rafael J. Wysocki
parent ba43d6db6e
commit f38d1a6d00
3 changed files with 70 additions and 41 deletions
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14
include/linux/pm_domain.h
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@ -91,6 +91,14 @@ struct gpd_dev_ops {
int (*stop)(struct device *dev);
};
struct genpd_governor_data {
s64 max_off_time_ns;
bool max_off_time_changed;
ktime_t next_wakeup;
bool cached_power_down_ok;
bool cached_power_down_state_idx;
};
struct genpd_power_state {
s64 power_off_latency_ns;
s64 power_on_latency_ns;
@ -114,6 +122,7 @@ struct generic_pm_domain {
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 genpd_governor_data *gd; /* Data used by a genpd governor. */
struct work_struct power_off_work;
struct fwnode_handle *provider; /* Identity of the domain provider */
bool has_provider;
@ -134,11 +143,6 @@ struct generic_pm_domain {
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,