1 files changed, 0 insertions, 513 deletions
diff --git a/ANDROID_3.4.5/drivers/base/power/qos.c b/ANDROID_3.4.5/drivers/base/power/qos.c
deleted file mode 100644
index fd849a2c..00000000
--- a/ANDROID_3.4.5/drivers/base/power/qos.c
+++ /dev/null
@@ -1,513 +0,0 @@
-/*
- * Devices PM QoS constraints management
- *
- * Copyright (C) 2011 Texas Instruments, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- *
- * This module exposes the interface to kernel space for specifying
- * per-device PM QoS dependencies. It provides infrastructure for registration
- * of:
- *
- * Dependents on a QoS value : register requests
- * Watchers of QoS value : get notified when target QoS value changes
- *
- * This QoS design is best effort based. Dependents register their QoS needs.
- * Watchers register to keep track of the current QoS needs of the system.
- * Watchers can register different types of notification callbacks:
- *  . a per-device notification callback using the dev_pm_qos_*_notifier API.
- *    The notification chain data is stored in the per-device constraint
- *    data struct.
- *  . a system-wide notification callback using the dev_pm_qos_*_global_notifier
- *    API. The notification chain data is stored in a static variable.
- *
- * Note about the per-device constraint data struct allocation:
- * . The per-device constraints data struct ptr is tored into the device
- *    dev_pm_info.
- * . To minimize the data usage by the per-device constraints, the data struct
- *   is only allocated at the first call to dev_pm_qos_add_request.
- * . The data is later free'd when the device is removed from the system.
- *  . A global mutex protects the constraints users from the data being
- *     allocated and free'd.
- */
-
-#include <linux/pm_qos.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/device.h>
-#include <linux/mutex.h>
-#include <linux/export.h>
-
-#include "power.h"
-
-static DEFINE_MUTEX(dev_pm_qos_mtx);
-
-static BLOCKING_NOTIFIER_HEAD(dev_pm_notifiers);
-
-/**
- * __dev_pm_qos_read_value - Get PM QoS constraint for a given device.
- * @dev: Device to get the PM QoS constraint value for.
- *
- * This routine must be called with dev->power.lock held.
- */
-s32 __dev_pm_qos_read_value(struct device *dev)
-{
-	struct pm_qos_constraints *c = dev->power.constraints;
-
-	return c ? pm_qos_read_value(c) : 0;
-}
-
-/**
- * dev_pm_qos_read_value - Get PM QoS constraint for a given device (locked).
- * @dev: Device to get the PM QoS constraint value for.
- */
-s32 dev_pm_qos_read_value(struct device *dev)
-{
-	unsigned long flags;
-	s32 ret;
-
-	spin_lock_irqsave(&dev->power.lock, flags);
-	ret = __dev_pm_qos_read_value(dev);
-	spin_unlock_irqrestore(&dev->power.lock, flags);
-
-	return ret;
-}
-
-/*
- * apply_constraint
- * @req: constraint request to apply
- * @action: action to perform add/update/remove, of type enum pm_qos_req_action
- * @value: defines the qos request
- *
- * Internal function to update the constraints list using the PM QoS core
- * code and if needed call the per-device and the global notification
- * callbacks
- */
-static int apply_constraint(struct dev_pm_qos_request *req,
-			    enum pm_qos_req_action action, int value)
-{
-	int ret, curr_value;
-
-	ret = pm_qos_update_target(req->dev->power.constraints,
-				   &req->node, action, value);
-
-	if (ret) {
-		/* Call the global callbacks if needed */
-		curr_value = pm_qos_read_value(req->dev->power.constraints);
-		blocking_notifier_call_chain(&dev_pm_notifiers,
-					     (unsigned long)curr_value,
-					     req);
-	}
-
-	return ret;
-}
-
-/*
- * dev_pm_qos_constraints_allocate
- * @dev: device to allocate data for
- *
- * Called at the first call to add_request, for constraint data allocation
- * Must be called with the dev_pm_qos_mtx mutex held
- */
-static int dev_pm_qos_constraints_allocate(struct device *dev)
-{
-	struct pm_qos_constraints *c;
-	struct blocking_notifier_head *n;
-
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
-	if (!c)
-		return -ENOMEM;
-
-	n = kzalloc(sizeof(*n), GFP_KERNEL);
-	if (!n) {
-		kfree(c);
-		return -ENOMEM;
-	}
-	BLOCKING_INIT_NOTIFIER_HEAD(n);
-
-	plist_head_init(&c->list);
-	c->target_value = PM_QOS_DEV_LAT_DEFAULT_VALUE;
-	c->default_value = PM_QOS_DEV_LAT_DEFAULT_VALUE;
-	c->type = PM_QOS_MIN;
-	c->notifiers = n;
-
-	spin_lock_irq(&dev->power.lock);
-	dev->power.constraints = c;
-	spin_unlock_irq(&dev->power.lock);
-
-	return 0;
-}
-
-/**
- * dev_pm_qos_constraints_init - Initalize device's PM QoS constraints pointer.
- * @dev: target device
- *
- * Called from the device PM subsystem during device insertion under
- * device_pm_lock().
- */
-void dev_pm_qos_constraints_init(struct device *dev)
-{
-	mutex_lock(&dev_pm_qos_mtx);
-	dev->power.constraints = NULL;
-	dev->power.power_state = PMSG_ON;
-	mutex_unlock(&dev_pm_qos_mtx);
-}
-
-/**
- * dev_pm_qos_constraints_destroy
- * @dev: target device
- *
- * Called from the device PM subsystem on device removal under device_pm_lock().
- */
-void dev_pm_qos_constraints_destroy(struct device *dev)
-{
-	struct dev_pm_qos_request *req, *tmp;
-	struct pm_qos_constraints *c;
-
-	/*
-	 * If the device's PM QoS resume latency limit has been exposed to user
-	 * space, it has to be hidden at this point.
-	 */
-	dev_pm_qos_hide_latency_limit(dev);
-
-	mutex_lock(&dev_pm_qos_mtx);
-
-	dev->power.power_state = PMSG_INVALID;
-	c = dev->power.constraints;
-	if (!c)
-		goto out;
-
-	/* Flush the constraints list for the device */
-	plist_for_each_entry_safe(req, tmp, &c->list, node) {
-		/*
-		 * Update constraints list and call the notification
-		 * callbacks if needed
-		 */
-		apply_constraint(req, PM_QOS_REMOVE_REQ, PM_QOS_DEFAULT_VALUE);
-		memset(req, 0, sizeof(*req));
-	}
-
-	spin_lock_irq(&dev->power.lock);
-	dev->power.constraints = NULL;
-	spin_unlock_irq(&dev->power.lock);
-
-	kfree(c->notifiers);
-	kfree(c);
-
- out:
-	mutex_unlock(&dev_pm_qos_mtx);
-}
-
-/**
- * dev_pm_qos_add_request - inserts new qos request into the list
- * @dev: target device for the constraint
- * @req: pointer to a preallocated handle
- * @value: defines the qos request
- *
- * This function inserts a new entry in the device constraints list of
- * requested qos performance characteristics. It recomputes the aggregate
- * QoS expectations of parameters and initializes the dev_pm_qos_request
- * handle.  Caller needs to save this handle for later use in updates and
- * removal.
- *
- * Returns 1 if the aggregated constraint value has changed,
- * 0 if the aggregated constraint value has not changed,
- * -EINVAL in case of wrong parameters, -ENOMEM if there's not enough memory
- * to allocate for data structures, -ENODEV if the device has just been removed
- * from the system.
- */
-int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
-			   s32 value)
-{
-	int ret = 0;
-
-	if (!dev || !req) /*guard against callers passing in null */
-		return -EINVAL;
-
-	if (WARN(dev_pm_qos_request_active(req),
-		 "%s() called for already added request\n", __func__))
-		return -EINVAL;
-
-	req->dev = dev;
-
-	mutex_lock(&dev_pm_qos_mtx);
-
-	if (!dev->power.constraints) {
-		if (dev->power.power_state.event == PM_EVENT_INVALID) {
-			/* The device has been removed from the system. */
-			req->dev = NULL;
-			ret = -ENODEV;
-			goto out;
-		} else {
-			/*
-			 * Allocate the constraints data on the first call to
-			 * add_request, i.e. only if the data is not already
-			 * allocated and if the device has not been removed.
-			 */
-			ret = dev_pm_qos_constraints_allocate(dev);
-		}
-	}
-
-	if (!ret)
-		ret = apply_constraint(req, PM_QOS_ADD_REQ, value);
-
- out:
-	mutex_unlock(&dev_pm_qos_mtx);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(dev_pm_qos_add_request);
-
-/**
- * dev_pm_qos_update_request - modifies an existing qos request
- * @req : handle to list element holding a dev_pm_qos request to use
- * @new_value: defines the qos request
- *
- * Updates an existing dev PM qos request along with updating the
- * target value.
- *
- * Attempts are made to make this code callable on hot code paths.
- *
- * Returns 1 if the aggregated constraint value has changed,
- * 0 if the aggregated constraint value has not changed,
- * -EINVAL in case of wrong parameters, -ENODEV if the device has been
- * removed from the system
- */
-int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
-			      s32 new_value)
-{
-	int ret = 0;
-
-	if (!req) /*guard against callers passing in null */
-		return -EINVAL;
-
-	if (WARN(!dev_pm_qos_request_active(req),
-		 "%s() called for unknown object\n", __func__))
-		return -EINVAL;
-
-	mutex_lock(&dev_pm_qos_mtx);
-
-	if (req->dev->power.constraints) {
-		if (new_value != req->node.prio)
-			ret = apply_constraint(req, PM_QOS_UPDATE_REQ,
-					       new_value);
-	} else {
-		/* Return if the device has been removed */
-		ret = -ENODEV;
-	}
-
-	mutex_unlock(&dev_pm_qos_mtx);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(dev_pm_qos_update_request);
-
-/**
- * dev_pm_qos_remove_request - modifies an existing qos request
- * @req: handle to request list element
- *
- * Will remove pm qos request from the list of constraints and
- * recompute the current target value. Call this on slow code paths.
- *
- * Returns 1 if the aggregated constraint value has changed,
- * 0 if the aggregated constraint value has not changed,
- * -EINVAL in case of wrong parameters, -ENODEV if the device has been
- * removed from the system
- */
-int dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
-{
-	int ret = 0;
-
-	if (!req) /*guard against callers passing in null */
-		return -EINVAL;
-
-	if (WARN(!dev_pm_qos_request_active(req),
-		 "%s() called for unknown object\n", __func__))
-		return -EINVAL;
-
-	mutex_lock(&dev_pm_qos_mtx);
-
-	if (req->dev->power.constraints) {
-		ret = apply_constraint(req, PM_QOS_REMOVE_REQ,
-				       PM_QOS_DEFAULT_VALUE);
-		memset(req, 0, sizeof(*req));
-	} else {
-		/* Return if the device has been removed */
-		ret = -ENODEV;
-	}
-
-	mutex_unlock(&dev_pm_qos_mtx);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(dev_pm_qos_remove_request);
-
-/**
- * dev_pm_qos_add_notifier - sets notification entry for changes to target value
- * of per-device PM QoS constraints
- *
- * @dev: target device for the constraint
- * @notifier: notifier block managed by caller.
- *
- * Will register the notifier into a notification chain that gets called
- * upon changes to the target value for the device.
- *
- * If the device's constraints object doesn't exist when this routine is called,
- * it will be created (or error code will be returned if that fails).
- */
-int dev_pm_qos_add_notifier(struct device *dev, struct notifier_block *notifier)
-{
-	int ret = 0;
-
-	mutex_lock(&dev_pm_qos_mtx);
-
-	if (!dev->power.constraints)
-		ret = dev->power.power_state.event != PM_EVENT_INVALID ?
-			dev_pm_qos_constraints_allocate(dev) : -ENODEV;
-
-	if (!ret)
-		ret = blocking_notifier_chain_register(
-				dev->power.constraints->notifiers, notifier);
-
-	mutex_unlock(&dev_pm_qos_mtx);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(dev_pm_qos_add_notifier);
-
-/**
- * dev_pm_qos_remove_notifier - deletes notification for changes to target value
- * of per-device PM QoS constraints
- *
- * @dev: target device for the constraint
- * @notifier: notifier block to be removed.
- *
- * Will remove the notifier from the notification chain that gets called
- * upon changes to the target value.
- */
-int dev_pm_qos_remove_notifier(struct device *dev,
-			       struct notifier_block *notifier)
-{
-	int retval = 0;
-
-	mutex_lock(&dev_pm_qos_mtx);
-
-	/* Silently return if the constraints object is not present. */
-	if (dev->power.constraints)
-		retval = blocking_notifier_chain_unregister(
-				dev->power.constraints->notifiers,
-				notifier);
-
-	mutex_unlock(&dev_pm_qos_mtx);
-	return retval;
-}
-EXPORT_SYMBOL_GPL(dev_pm_qos_remove_notifier);
-
-/**
- * dev_pm_qos_add_global_notifier - sets notification entry for changes to
- * target value of the PM QoS constraints for any device
- *
- * @notifier: notifier block managed by caller.
- *
- * Will register the notifier into a notification chain that gets called
- * upon changes to the target value for any device.
- */
-int dev_pm_qos_add_global_notifier(struct notifier_block *notifier)
-{
-	return blocking_notifier_chain_register(&dev_pm_notifiers, notifier);
-}
-EXPORT_SYMBOL_GPL(dev_pm_qos_add_global_notifier);
-
-/**
- * dev_pm_qos_remove_global_notifier - deletes notification for changes to
- * target value of PM QoS constraints for any device
- *
- * @notifier: notifier block to be removed.
- *
- * Will remove the notifier from the notification chain that gets called
- * upon changes to the target value for any device.
- */
-int dev_pm_qos_remove_global_notifier(struct notifier_block *notifier)
-{
-	return blocking_notifier_chain_unregister(&dev_pm_notifiers, notifier);
-}
-EXPORT_SYMBOL_GPL(dev_pm_qos_remove_global_notifier);
-
-/**
- * dev_pm_qos_add_ancestor_request - Add PM QoS request for device's ancestor.
- * @dev: Device whose ancestor to add the request for.
- * @req: Pointer to the preallocated handle.
- * @value: Constraint latency value.
- */
-int dev_pm_qos_add_ancestor_request(struct device *dev,
-				    struct dev_pm_qos_request *req, s32 value)
-{
-	struct device *ancestor = dev->parent;
-	int error = -ENODEV;
-
-	while (ancestor && !ancestor->power.ignore_children)
-		ancestor = ancestor->parent;
-
-	if (ancestor)
-		error = dev_pm_qos_add_request(ancestor, req, value);
-
-	if (error)
-		req->dev = NULL;
-
-	return error;
-}
-EXPORT_SYMBOL_GPL(dev_pm_qos_add_ancestor_request);
-
-#ifdef CONFIG_PM_RUNTIME
-static void __dev_pm_qos_drop_user_request(struct device *dev)
-{
-	dev_pm_qos_remove_request(dev->power.pq_req);
-	dev->power.pq_req = 0;
-}
-
-/**
- * dev_pm_qos_expose_latency_limit - Expose PM QoS latency limit to user space.
- * @dev: Device whose PM QoS latency limit is to be exposed to user space.
- * @value: Initial value of the latency limit.
- */
-int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value)
-{
-	struct dev_pm_qos_request *req;
-	int ret;
-
-	if (!device_is_registered(dev) || value < 0)
-		return -EINVAL;
-
-	if (dev->power.pq_req)
-		return -EEXIST;
-
-	req = kzalloc(sizeof(*req), GFP_KERNEL);
-	if (!req)
-		return -ENOMEM;
-
-	ret = dev_pm_qos_add_request(dev, req, value);
-	if (ret < 0)
-		return ret;
-
-	dev->power.pq_req = req;
-	ret = pm_qos_sysfs_add(dev);
-	if (ret)
-		__dev_pm_qos_drop_user_request(dev);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(dev_pm_qos_expose_latency_limit);
-
-/**
- * dev_pm_qos_hide_latency_limit - Hide PM QoS latency limit from user space.
- * @dev: Device whose PM QoS latency limit is to be hidden from user space.
- */
-void dev_pm_qos_hide_latency_limit(struct device *dev)
-{
-	if (dev->power.pq_req) {
-		pm_qos_sysfs_remove(dev);
-		__dev_pm_qos_drop_user_request(dev);
-	}
-}
-EXPORT_SYMBOL_GPL(dev_pm_qos_hide_latency_limit);
-#endif /* CONFIG_PM_RUNTIME */