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Diffstat (limited to 'include/linux/pm_qos.h')
-rw-r--r--include/linux/pm_qos.h81
1 files changed, 42 insertions, 39 deletions
diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
index 19eafca5680e..4a69d4af3ff8 100644
--- a/include/linux/pm_qos.h
+++ b/include/linux/pm_qos.h
@@ -1,22 +1,20 @@
/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _LINUX_PM_QOS_H
-#define _LINUX_PM_QOS_H
-/* interface for the pm_qos_power infrastructure of the linux kernel.
+/*
+ * Definitions related to Power Management Quality of Service (PM QoS).
*
- * Mark Gross <mgross@linux.intel.com>
+ * Copyright (C) 2020 Intel Corporation
+ *
+ * Authors:
+ * Mark Gross <mgross@linux.intel.com>
+ * Rafael J. Wysocki <rafael.j.wysocki@intel.com>
*/
+
+#ifndef _LINUX_PM_QOS_H
+#define _LINUX_PM_QOS_H
+
#include <linux/plist.h>
#include <linux/notifier.h>
#include <linux/device.h>
-#include <linux/workqueue.h>
-
-enum {
- PM_QOS_RESERVED = 0,
- PM_QOS_CPU_DMA_LATENCY,
-
- /* insert new class ID */
- PM_QOS_NUM_CLASSES,
-};
enum pm_qos_flags_status {
PM_QOS_FLAGS_UNDEFINED = -1,
@@ -29,7 +27,7 @@ enum pm_qos_flags_status {
#define PM_QOS_LATENCY_ANY S32_MAX
#define PM_QOS_LATENCY_ANY_NS ((s64)PM_QOS_LATENCY_ANY * NSEC_PER_USEC)
-#define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
+#define PM_QOS_CPU_LATENCY_DEFAULT_VALUE (2000 * USEC_PER_SEC)
#define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE PM_QOS_LATENCY_ANY
#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT PM_QOS_LATENCY_ANY
#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS PM_QOS_LATENCY_ANY_NS
@@ -40,22 +38,10 @@ enum pm_qos_flags_status {
#define PM_QOS_FLAG_NO_POWER_OFF (1 << 0)
-struct pm_qos_request {
- struct plist_node node;
- int pm_qos_class;
- struct delayed_work work; /* for pm_qos_update_request_timeout */
-};
-
-struct pm_qos_flags_request {
- struct list_head node;
- s32 flags; /* Do not change to 64 bit */
-};
-
enum pm_qos_type {
PM_QOS_UNITIALIZED,
PM_QOS_MAX, /* return the largest value */
PM_QOS_MIN, /* return the smallest value */
- PM_QOS_SUM /* return the sum */
};
/*
@@ -72,6 +58,16 @@ struct pm_qos_constraints {
struct blocking_notifier_head *notifiers;
};
+struct pm_qos_request {
+ struct plist_node node;
+ struct pm_qos_constraints *qos;
+};
+
+struct pm_qos_flags_request {
+ struct list_head node;
+ s32 flags; /* Do not change to 64 bit */
+};
+
struct pm_qos_flags {
struct list_head list;
s32 effective_flags; /* Do not change to 64 bit */
@@ -140,24 +136,31 @@ static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req)
return req->dev != NULL;
}
+s32 pm_qos_read_value(struct pm_qos_constraints *c);
int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
enum pm_qos_req_action action, int value);
bool pm_qos_update_flags(struct pm_qos_flags *pqf,
struct pm_qos_flags_request *req,
enum pm_qos_req_action action, s32 val);
-void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
- s32 value);
-void pm_qos_update_request(struct pm_qos_request *req,
- s32 new_value);
-void pm_qos_update_request_timeout(struct pm_qos_request *req,
- s32 new_value, unsigned long timeout_us);
-void pm_qos_remove_request(struct pm_qos_request *req);
-
-int pm_qos_request(int pm_qos_class);
-int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier);
-int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
-int pm_qos_request_active(struct pm_qos_request *req);
-s32 pm_qos_read_value(struct pm_qos_constraints *c);
+
+#ifdef CONFIG_CPU_IDLE
+s32 cpu_latency_qos_limit(void);
+bool cpu_latency_qos_request_active(struct pm_qos_request *req);
+void cpu_latency_qos_add_request(struct pm_qos_request *req, s32 value);
+void cpu_latency_qos_update_request(struct pm_qos_request *req, s32 new_value);
+void cpu_latency_qos_remove_request(struct pm_qos_request *req);
+#else
+static inline s32 cpu_latency_qos_limit(void) { return INT_MAX; }
+static inline bool cpu_latency_qos_request_active(struct pm_qos_request *req)
+{
+ return false;
+}
+static inline void cpu_latency_qos_add_request(struct pm_qos_request *req,
+ s32 value) {}
+static inline void cpu_latency_qos_update_request(struct pm_qos_request *req,
+ s32 new_value) {}
+static inline void cpu_latency_qos_remove_request(struct pm_qos_request *req) {}
+#endif
#ifdef CONFIG_PM
enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask);