Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 319 insertions, 0 deletions

diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
new file mode 100644
index 000000000..4a69d4af3
--- /dev/null
+++ b/include/linux/pm_qos.h
@@ -0,0 +1,319 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Definitions related to Power Management Quality of Service (PM QoS).
+ *
+ * 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>
+
+enum pm_qos_flags_status {
+	PM_QOS_FLAGS_UNDEFINED = -1,
+	PM_QOS_FLAGS_NONE,
+	PM_QOS_FLAGS_SOME,
+	PM_QOS_FLAGS_ALL,
+};
+
+#define PM_QOS_DEFAULT_VALUE	(-1)
+#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_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
+#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)
+
+enum pm_qos_type {
+	PM_QOS_UNITIALIZED,
+	PM_QOS_MAX,		/* return the largest value */
+	PM_QOS_MIN,		/* return the smallest value */
+};
+
+/*
+ * Note: The lockless read path depends on the CPU accessing target_value
+ * or effective_flags atomically.  Atomic access is only guaranteed on all CPU
+ * types linux supports for 32 bit quantites
+ */
+struct pm_qos_constraints {
+	struct plist_head list;
+	s32 target_value;	/* Do not change to 64 bit */
+	s32 default_value;
+	s32 no_constraint_value;
+	enum pm_qos_type type;
+	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 */
+};
+
+
+#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;
+	struct dev_pm_qos_request *flags_req;
+};
+
+/* Action requested to pm_qos_update_target */
+enum pm_qos_req_action {
+	PM_QOS_ADD_REQ,		/* Add a new request */
+	PM_QOS_UPDATE_REQ,	/* Update an existing request */
+	PM_QOS_REMOVE_REQ	/* Remove an existing request */
+};
+
+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);
+
+#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);
+enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask);
+s32 __dev_pm_qos_resume_latency(struct device *dev);
+s32 dev_pm_qos_read_value(struct device *dev, enum dev_pm_qos_req_type type);
+int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
+			   enum dev_pm_qos_req_type type, s32 value);
+int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value);
+int dev_pm_qos_remove_request(struct dev_pm_qos_request *req);
+int dev_pm_qos_add_notifier(struct device *dev,
+			    struct notifier_block *notifier,
+			    enum dev_pm_qos_req_type type);
+int dev_pm_qos_remove_notifier(struct device *dev,
+			       struct notifier_block *notifier,
+			       enum dev_pm_qos_req_type type);
+void dev_pm_qos_constraints_init(struct device *dev);
+void dev_pm_qos_constraints_destroy(struct device *dev);
+int dev_pm_qos_add_ancestor_request(struct device *dev,
+				    struct dev_pm_qos_request *req,
+				    enum dev_pm_qos_req_type type, s32 value);
+int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value);
+void dev_pm_qos_hide_latency_limit(struct device *dev);
+int dev_pm_qos_expose_flags(struct device *dev, s32 value);
+void dev_pm_qos_hide_flags(struct device *dev);
+int dev_pm_qos_update_flags(struct device *dev, s32 mask, bool set);
+s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev);
+int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val);
+int dev_pm_qos_expose_latency_tolerance(struct device *dev);
+void dev_pm_qos_hide_latency_tolerance(struct device *dev);
+
+static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev)
+{
+	return dev->power.qos->resume_latency_req->data.pnode.prio;
+}
+
+static inline s32 dev_pm_qos_requested_flags(struct device *dev)
+{
+	return dev->power.qos->flags_req->data.flr.flags;
+}
+
+static inline s32 dev_pm_qos_raw_resume_latency(struct device *dev)
+{
+	return IS_ERR_OR_NULL(dev->power.qos) ?
+		PM_QOS_RESUME_LATENCY_NO_CONSTRAINT :
+		pm_qos_read_value(&dev->power.qos->resume_latency);
+}
+#else
+static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev,
+							  s32 mask)
+			{ return PM_QOS_FLAGS_UNDEFINED; }
+static inline enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev,
+							s32 mask)
+			{ return PM_QOS_FLAGS_UNDEFINED; }
+static inline s32 __dev_pm_qos_resume_latency(struct device *dev)
+			{ return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; }
+static inline s32 dev_pm_qos_read_value(struct device *dev,
+					enum dev_pm_qos_req_type type)
+{
+	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;
+	}
+}
+
+static inline int dev_pm_qos_add_request(struct device *dev,
+					 struct dev_pm_qos_request *req,
+					 enum dev_pm_qos_req_type type,
+					 s32 value)
+			{ return 0; }
+static inline int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
+					    s32 new_value)
+			{ return 0; }
+static inline int dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
+			{ return 0; }
+static inline int dev_pm_qos_add_notifier(struct device *dev,
+					  struct notifier_block *notifier,
+					  enum dev_pm_qos_req_type type)
+			{ return 0; }
+static inline int dev_pm_qos_remove_notifier(struct device *dev,
+					     struct notifier_block *notifier,
+					     enum dev_pm_qos_req_type type)
+			{ return 0; }
+static inline void dev_pm_qos_constraints_init(struct device *dev)
+{
+	dev->power.power_state = PMSG_ON;
+}
+static inline void dev_pm_qos_constraints_destroy(struct device *dev)
+{
+	dev->power.power_state = PMSG_INVALID;
+}
+static inline int dev_pm_qos_add_ancestor_request(struct device *dev,
+						  struct dev_pm_qos_request *req,
+						  enum dev_pm_qos_req_type type,
+						  s32 value)
+			{ return 0; }
+static inline int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value)
+			{ return 0; }
+static inline void dev_pm_qos_hide_latency_limit(struct device *dev) {}
+static inline int dev_pm_qos_expose_flags(struct device *dev, s32 value)
+			{ return 0; }
+static inline void dev_pm_qos_hide_flags(struct device *dev) {}
+static inline int dev_pm_qos_update_flags(struct device *dev, s32 m, bool set)
+			{ return 0; }
+static inline s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev)
+			{ return PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; }
+static inline int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val)
+			{ return 0; }
+static inline int dev_pm_qos_expose_latency_tolerance(struct device *dev)
+			{ return 0; }
+static inline void dev_pm_qos_hide_latency_tolerance(struct device *dev) {}
+
+static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev)
+{
+	return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
+}
+static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; }
+static inline s32 dev_pm_qos_raw_resume_latency(struct device *dev)
+{
+	return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
+}
+#endif
+
+static inline int freq_qos_request_active(struct freq_qos_request *req)
+{
+	return !IS_ERR_OR_NULL(req->qos);
+}
+
+void freq_constraints_init(struct freq_constraints *qos);
+
+s32 freq_qos_read_value(struct freq_constraints *qos,
+			enum freq_qos_req_type type);
+
+int freq_qos_add_request(struct freq_constraints *qos,
+			 struct freq_qos_request *req,
+			 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,
+			  struct notifier_block *notifier);
+int freq_qos_remove_notifier(struct freq_constraints *qos,
+			     enum freq_qos_req_type type,
+			     struct notifier_block *notifier);
+
+#endif