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Merge tag 'pm-5.5-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

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Pull additional power management updates from Rafael Wysocki:
 "These fix an ACPI EC driver bug exposed by the recent rework of the
  suspend-to-idle code flow, reintroduce frequency constraints into
  device PM QoS (in preparation for adding QoS support to devfreq), drop
  a redundant field from struct cpuidle_state and clean up Kconfig in
  some places.

  Specifics:

   - Avoid a race condition in the ACPI EC driver that may cause systems
     to be unable to leave suspend-to-idle (Rafael Wysocki)

   - Drop the "disabled" field, which is redundant, from struct
     cpuidle_state (Rafael Wysocki)

   - Reintroduce device PM QoS frequency constraints (temporarily
     introduced and than dropped during the 5.4 cycle) in preparation
     for adding QoS support to devfreq (Leonard Crestez)

   - Clean up indentation (in multiple places) and the cpuidle drivers
     help text in Kconfig (Krzysztof Kozlowski, Randy Dunlap)"

* tag 'pm-5.5-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: PM: s2idle: Rework ACPI events synchronization
  ACPI: EC: Rework flushing of pending work
  PM / devfreq: Add missing locking while setting suspend_freq
  PM / QoS: Restore DEV_PM_QOS_MIN/MAX_FREQUENCY
  PM / QoS: Reorder pm_qos/freq_qos/dev_pm_qos structs
  PM / QoS: Initial kunit test
  PM / QoS: Redefine FREQ_QOS_MAX_DEFAULT_VALUE to S32_MAX
  power: avs: Fix Kconfig indentation
  cpufreq: Fix Kconfig indentation
  cpuidle: minor Kconfig help text fixes
  cpuidle: Drop disabled field from struct cpuidle_state
  cpuidle: Fix Kconfig indentation
This commit is contained in:
Linus Torvalds
2019-12-04 10:48:09 -08:00
parent 63de37476e 1e4230f56d
commit ef867c12f3
19 changed files with 324 additions and 120 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/cpuidle.h
View File

@@ -54,7 +54,6 @@ struct cpuidle_state {
unsigned int exit_latency; /* in US */
int power_usage; /* in mW */
unsigned int target_residency; /* in US */
bool disabled; /* disabled on all CPUs */
int (*enter) (struct cpuidle_device *dev,
struct cpuidle_driver *drv,
@@ -77,6 +76,7 @@ struct cpuidle_state {
#define CPUIDLE_FLAG_POLLING BIT(0) /* polling state */
#define CPUIDLE_FLAG_COUPLED BIT(1) /* state applies to multiple cpus */
#define CPUIDLE_FLAG_TIMER_STOP BIT(2) /* timer is stopped on this state */
#define CPUIDLE_FLAG_UNUSABLE BIT(3) /* avoid using this state */
struct cpuidle_device_kobj;
struct cpuidle_state_kobj;

86
include/linux/pm_qos.h
View File

@@ -34,6 +34,8 @@ enum pm_qos_flags_status {
#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT PM_QOS_LATENCY_ANY
#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS PM_QOS_LATENCY_ANY_NS
#define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE 0
#define PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE 0
#define PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE FREQ_QOS_MAX_DEFAULT_VALUE
#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1)
#define PM_QOS_FLAG_NO_POWER_OFF (1 << 0)
@@ -49,21 +51,6 @@ struct pm_qos_flags_request {
s32 flags; /* Do not change to 64 bit */
};
enum dev_pm_qos_req_type {
DEV_PM_QOS_RESUME_LATENCY = 1,
DEV_PM_QOS_LATENCY_TOLERANCE,
DEV_PM_QOS_FLAGS,
};
struct dev_pm_qos_request {
enum dev_pm_qos_req_type type;
union {
struct plist_node pnode;
struct pm_qos_flags_request flr;
} data;
struct device *dev;
};
enum pm_qos_type {
PM_QOS_UNITIALIZED,
PM_QOS_MAX, /* return the largest value */
@@ -90,9 +77,51 @@ struct pm_qos_flags {
s32 effective_flags; /* Do not change to 64 bit */
};
#define FREQ_QOS_MIN_DEFAULT_VALUE 0
#define FREQ_QOS_MAX_DEFAULT_VALUE S32_MAX
enum freq_qos_req_type {
FREQ_QOS_MIN = 1,
FREQ_QOS_MAX,
};
struct freq_constraints {
struct pm_qos_constraints min_freq;
struct blocking_notifier_head min_freq_notifiers;
struct pm_qos_constraints max_freq;
struct blocking_notifier_head max_freq_notifiers;
};
struct freq_qos_request {
enum freq_qos_req_type type;
struct plist_node pnode;
struct freq_constraints *qos;
};
enum dev_pm_qos_req_type {
DEV_PM_QOS_RESUME_LATENCY = 1,
DEV_PM_QOS_LATENCY_TOLERANCE,
DEV_PM_QOS_MIN_FREQUENCY,
DEV_PM_QOS_MAX_FREQUENCY,
DEV_PM_QOS_FLAGS,
};
struct dev_pm_qos_request {
enum dev_pm_qos_req_type type;
union {
struct plist_node pnode;
struct pm_qos_flags_request flr;
struct freq_qos_request freq;
} data;
struct device *dev;
};
struct dev_pm_qos {
struct pm_qos_constraints resume_latency;
struct pm_qos_constraints latency_tolerance;
struct freq_constraints freq;
struct pm_qos_flags flags;
struct dev_pm_qos_request *resume_latency_req;
struct dev_pm_qos_request *latency_tolerance_req;
@@ -191,6 +220,10 @@ static inline s32 dev_pm_qos_read_value(struct device *dev,
switch (type) {
case DEV_PM_QOS_RESUME_LATENCY:
return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
case DEV_PM_QOS_MIN_FREQUENCY:
return PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE;
case DEV_PM_QOS_MAX_FREQUENCY:
return PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE;
default:
WARN_ON(1);
return 0;
@@ -255,27 +288,6 @@ static inline s32 dev_pm_qos_raw_resume_latency(struct device *dev)
}
#endif
#define FREQ_QOS_MIN_DEFAULT_VALUE 0
#define FREQ_QOS_MAX_DEFAULT_VALUE (-1)
enum freq_qos_req_type {
FREQ_QOS_MIN = 1,
FREQ_QOS_MAX,
};
struct freq_constraints {
struct pm_qos_constraints min_freq;
struct blocking_notifier_head min_freq_notifiers;
struct pm_qos_constraints max_freq;
struct blocking_notifier_head max_freq_notifiers;
};
struct freq_qos_request {
enum freq_qos_req_type type;
struct plist_node pnode;
struct freq_constraints *qos;
};
static inline int freq_qos_request_active(struct freq_qos_request *req)
{
return !IS_ERR_OR_NULL(req->qos);
@@ -291,6 +303,8 @@ int freq_qos_add_request(struct freq_constraints *qos,
enum freq_qos_req_type type, s32 value);
int freq_qos_update_request(struct freq_qos_request *req, s32 new_value);
int freq_qos_remove_request(struct freq_qos_request *req);
int freq_qos_apply(struct freq_qos_request *req,
enum pm_qos_req_action action, s32 value);
int freq_qos_add_notifier(struct freq_constraints *qos,
enum freq_qos_req_type type,