1 files changed, 0 insertions, 413 deletions

diff --git a/kernel/pm_qos_params.c b/kernel/pm_qos_params.c
deleted file mode 100644
index f42d3f737a3..00000000000
--- a/kernel/pm_qos_params.c
+++ /dev/null
@@ -1,413 +0,0 @@
-/*
- * This module exposes the interface to kernel space for specifying
- * 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.
- *
- * There are 3 basic classes of QoS parameter: latency, timeout, throughput
- * each have defined units:
- * latency: usec
- * timeout: usec <-- currently not used.
- * throughput: kbs (kilo byte / sec)
- *
- * There are lists of pm_qos_objects each one wrapping requests, notifiers
- *
- * User mode requests on a QOS parameter register themselves to the
- * subsystem by opening the device node /dev/... and writing there request to
- * the node.  As long as the process holds a file handle open to the node the
- * client continues to be accounted for.  Upon file release the usermode
- * request is removed and a new qos target is computed.  This way when the
- * request that the application has is cleaned up when closes the file
- * pointer or exits the pm_qos_object will get an opportunity to clean up.
- *
- * Mark Gross <mgross@linux.intel.com>
- */
-
-/*#define DEBUG*/
-
-#include <linux/pm_qos_params.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/time.h>
-#include <linux/fs.h>
-#include <linux/device.h>
-#include <linux/miscdevice.h>
-#include <linux/string.h>
-#include <linux/platform_device.h>
-#include <linux/init.h>
-
-#include <linux/uaccess.h>
-
-/*
- * locking rule: all changes to requests or notifiers lists
- * or pm_qos_object list and pm_qos_objects need to happen with pm_qos_lock
- * held, taken with _irqsave.  One lock to rule them all
- */
-struct pm_qos_request_list {
-	struct list_head list;
-	union {
-		s32 value;
-		s32 usec;
-		s32 kbps;
-	};
-	int pm_qos_class;
-};
-
-static s32 max_compare(s32 v1, s32 v2);
-static s32 min_compare(s32 v1, s32 v2);
-
-struct pm_qos_object {
-	struct pm_qos_request_list requests;
-	struct blocking_notifier_head *notifiers;
-	struct miscdevice pm_qos_power_miscdev;
-	char *name;
-	s32 default_value;
-	atomic_t target_value;
-	s32 (*comparitor)(s32, s32);
-};
-
-static struct pm_qos_object null_pm_qos;
-static BLOCKING_NOTIFIER_HEAD(cpu_dma_lat_notifier);
-static struct pm_qos_object cpu_dma_pm_qos = {
-	.requests = {LIST_HEAD_INIT(cpu_dma_pm_qos.requests.list)},
-	.notifiers = &cpu_dma_lat_notifier,
-	.name = "cpu_dma_latency",
-	.default_value = 2000 * USEC_PER_SEC,
-	.target_value = ATOMIC_INIT(2000 * USEC_PER_SEC),
-	.comparitor = min_compare
-};
-
-static BLOCKING_NOTIFIER_HEAD(network_lat_notifier);
-static struct pm_qos_object network_lat_pm_qos = {
-	.requests = {LIST_HEAD_INIT(network_lat_pm_qos.requests.list)},
-	.notifiers = &network_lat_notifier,
-	.name = "network_latency",
-	.default_value = 2000 * USEC_PER_SEC,
-	.target_value = ATOMIC_INIT(2000 * USEC_PER_SEC),
-	.comparitor = min_compare
-};
-
-
-static BLOCKING_NOTIFIER_HEAD(network_throughput_notifier);
-static struct pm_qos_object network_throughput_pm_qos = {
-	.requests = {LIST_HEAD_INIT(network_throughput_pm_qos.requests.list)},
-	.notifiers = &network_throughput_notifier,
-	.name = "network_throughput",
-	.default_value = 0,
-	.target_value = ATOMIC_INIT(0),
-	.comparitor = max_compare
-};
-
-
-static struct pm_qos_object *pm_qos_array[] = {
-	&null_pm_qos,
-	&cpu_dma_pm_qos,
-	&network_lat_pm_qos,
-	&network_throughput_pm_qos
-};
-
-static DEFINE_SPINLOCK(pm_qos_lock);
-
-static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
-		size_t count, loff_t *f_pos);
-static int pm_qos_power_open(struct inode *inode, struct file *filp);
-static int pm_qos_power_release(struct inode *inode, struct file *filp);
-
-static const struct file_operations pm_qos_power_fops = {
-	.write = pm_qos_power_write,
-	.open = pm_qos_power_open,
-	.release = pm_qos_power_release,
-};
-
-/* static helper functions */
-static s32 max_compare(s32 v1, s32 v2)
-{
-	return max(v1, v2);
-}
-
-static s32 min_compare(s32 v1, s32 v2)
-{
-	return min(v1, v2);
-}
-
-
-static void update_target(int pm_qos_class)
-{
-	s32 extreme_value;
-	struct pm_qos_request_list *node;
-	unsigned long flags;
-	int call_notifier = 0;
-
-	spin_lock_irqsave(&pm_qos_lock, flags);
-	extreme_value = pm_qos_array[pm_qos_class]->default_value;
-	list_for_each_entry(node,
-			&pm_qos_array[pm_qos_class]->requests.list, list) {
-		extreme_value = pm_qos_array[pm_qos_class]->comparitor(
-				extreme_value, node->value);
-	}
-	if (atomic_read(&pm_qos_array[pm_qos_class]->target_value) !=
-			extreme_value) {
-		call_notifier = 1;
-		atomic_set(&pm_qos_array[pm_qos_class]->target_value,
-				extreme_value);
-		pr_debug(KERN_ERR "new target for qos %d is %d\n", pm_qos_class,
-			atomic_read(&pm_qos_array[pm_qos_class]->target_value));
-	}
-	spin_unlock_irqrestore(&pm_qos_lock, flags);
-
-	if (call_notifier)
-		blocking_notifier_call_chain(
-				pm_qos_array[pm_qos_class]->notifiers,
-					(unsigned long) extreme_value, NULL);
-}
-
-static int register_pm_qos_misc(struct pm_qos_object *qos)
-{
-	qos->pm_qos_power_miscdev.minor = MISC_DYNAMIC_MINOR;
-	qos->pm_qos_power_miscdev.name = qos->name;
-	qos->pm_qos_power_miscdev.fops = &pm_qos_power_fops;
-
-	return misc_register(&qos->pm_qos_power_miscdev);
-}
-
-static int find_pm_qos_object_by_minor(int minor)
-{
-	int pm_qos_class;
-
-	for (pm_qos_class = 0;
-		pm_qos_class < PM_QOS_NUM_CLASSES; pm_qos_class++) {
-		if (minor ==
-			pm_qos_array[pm_qos_class]->pm_qos_power_miscdev.minor)
-			return pm_qos_class;
-	}
-	return -1;
-}
-
-/**
- * pm_qos_request - returns current system wide qos expectation
- * @pm_qos_class: identification of which qos value is requested
- *
- * This function returns the current target value in an atomic manner.
- */
-int pm_qos_request(int pm_qos_class)
-{
-	return atomic_read(&pm_qos_array[pm_qos_class]->target_value);
-}
-EXPORT_SYMBOL_GPL(pm_qos_request);
-
-/**
- * pm_qos_add_request - inserts new qos request into the list
- * @pm_qos_class: identifies which list of qos request to us
- * @value: defines the qos request
- *
- * This function inserts a new entry in the pm_qos_class list of requested qos
- * performance characteristics.  It recomputes the aggregate QoS expectations
- * for the pm_qos_class of parameters, and returns the pm_qos_request list
- * element as a handle for use in updating and removal.  Call needs to save
- * this handle for later use.
- */
-struct pm_qos_request_list *pm_qos_add_request(int pm_qos_class, s32 value)
-{
-	struct pm_qos_request_list *dep;
-	unsigned long flags;
-
-	dep = kzalloc(sizeof(struct pm_qos_request_list), GFP_KERNEL);
-	if (dep) {
-		if (value == PM_QOS_DEFAULT_VALUE)
-			dep->value = pm_qos_array[pm_qos_class]->default_value;
-		else
-			dep->value = value;
-		dep->pm_qos_class = pm_qos_class;
-
-		spin_lock_irqsave(&pm_qos_lock, flags);
-		list_add(&dep->list,
-			&pm_qos_array[pm_qos_class]->requests.list);
-		spin_unlock_irqrestore(&pm_qos_lock, flags);
-		update_target(pm_qos_class);
-	}
-
-	return dep;
-}
-EXPORT_SYMBOL_GPL(pm_qos_add_request);
-
-/**
- * pm_qos_update_request - modifies an existing qos request
- * @pm_qos_req : handle to list element holding a pm_qos request to use
- * @value: defines the qos request
- *
- * Updates an existing qos request for the pm_qos_class of parameters along
- * with updating the target pm_qos_class value.
- *
- * Attempts are made to make this code callable on hot code paths.
- */
-void pm_qos_update_request(struct pm_qos_request_list *pm_qos_req,
-		s32 new_value)
-{
-	unsigned long flags;
-	int pending_update = 0;
-	s32 temp;
-
-	if (pm_qos_req) { /*guard against callers passing in null */
-		spin_lock_irqsave(&pm_qos_lock, flags);
-		if (new_value == PM_QOS_DEFAULT_VALUE)
-			temp = pm_qos_array[pm_qos_req->pm_qos_class]->default_value;
-		else
-			temp = new_value;
-
-		if (temp != pm_qos_req->value) {
-			pending_update = 1;
-			pm_qos_req->value = temp;
-		}
-		spin_unlock_irqrestore(&pm_qos_lock, flags);
-		if (pending_update)
-			update_target(pm_qos_req->pm_qos_class);
-	}
-}
-EXPORT_SYMBOL_GPL(pm_qos_update_request);
-
-/**
- * pm_qos_remove_request - modifies an existing qos request
- * @pm_qos_req: handle to request list element
- *
- * Will remove pm qos request from the list of requests and
- * recompute the current target value for the pm_qos_class.  Call this
- * on slow code paths.
- */
-void pm_qos_remove_request(struct pm_qos_request_list *pm_qos_req)
-{
-	unsigned long flags;
-	int qos_class;
-
-	if (pm_qos_req == NULL)
-		return;
-		/* silent return to keep pcm code cleaner */
-
-	qos_class = pm_qos_req->pm_qos_class;
-	spin_lock_irqsave(&pm_qos_lock, flags);
-	list_del(&pm_qos_req->list);
-	kfree(pm_qos_req);
-	spin_unlock_irqrestore(&pm_qos_lock, flags);
-	update_target(qos_class);
-}
-EXPORT_SYMBOL_GPL(pm_qos_remove_request);
-
-/**
- * pm_qos_add_notifier - sets notification entry for changes to target value
- * @pm_qos_class: identifies which qos target changes should be notified.
- * @notifier: notifier block managed by caller.
- *
- * will register the notifier into a notification chain that gets called
- * upon changes to the pm_qos_class target value.
- */
-int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier)
-{
-	int retval;
-
-	retval = blocking_notifier_chain_register(
-			pm_qos_array[pm_qos_class]->notifiers, notifier);
-
-	return retval;
-}
-EXPORT_SYMBOL_GPL(pm_qos_add_notifier);
-
-/**
- * pm_qos_remove_notifier - deletes notification entry from chain.
- * @pm_qos_class: identifies which qos target changes are notified.
- * @notifier: notifier block to be removed.
- *
- * will remove the notifier from the notification chain that gets called
- * upon changes to the pm_qos_class target value.
- */
-int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier)
-{
-	int retval;
-
-	retval = blocking_notifier_chain_unregister(
-			pm_qos_array[pm_qos_class]->notifiers, notifier);
-
-	return retval;
-}
-EXPORT_SYMBOL_GPL(pm_qos_remove_notifier);
-
-static int pm_qos_power_open(struct inode *inode, struct file *filp)
-{
-	long pm_qos_class;
-
-	pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
-	if (pm_qos_class >= 0) {
-		filp->private_data = (void *) pm_qos_add_request(pm_qos_class,
-				PM_QOS_DEFAULT_VALUE);
-
-		if (filp->private_data)
-			return 0;
-	}
-	return -EPERM;
-}
-
-static int pm_qos_power_release(struct inode *inode, struct file *filp)
-{
-	struct pm_qos_request_list *req;
-
-	req = (struct pm_qos_request_list *)filp->private_data;
-	pm_qos_remove_request(req);
-
-	return 0;
-}
-
-
-static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
-		size_t count, loff_t *f_pos)
-{
-	s32 value;
-	int x;
-	char ascii_value[11];
-	struct pm_qos_request_list *pm_qos_req;
-
-	if (count == sizeof(s32)) {
-		if (copy_from_user(&value, buf, sizeof(s32)))
-			return -EFAULT;
-	} else if (count == 11) { /* len('0x12345678/0') */
-		if (copy_from_user(ascii_value, buf, 11))
-			return -EFAULT;
-		x = sscanf(ascii_value, "%x", &value);
-		if (x != 1)
-			return -EINVAL;
-		pr_debug(KERN_ERR "%s, %d, 0x%x\n", ascii_value, x, value);
-	} else
-		return -EINVAL;
-
-	pm_qos_req = (struct pm_qos_request_list *)filp->private_data;
-	pm_qos_update_request(pm_qos_req, value);
-
-	return count;
-}
-
-
-static int __init pm_qos_power_init(void)
-{
-	int ret = 0;
-
-	ret = register_pm_qos_misc(&cpu_dma_pm_qos);
-	if (ret < 0) {
-		printk(KERN_ERR "pm_qos_param: cpu_dma_latency setup failed\n");
-		return ret;
-	}
-	ret = register_pm_qos_misc(&network_lat_pm_qos);
-	if (ret < 0) {
-		printk(KERN_ERR "pm_qos_param: network_latency setup failed\n");
-		return ret;
-	}
-	ret = register_pm_qos_misc(&network_throughput_pm_qos);
-	if (ret < 0)
-		printk(KERN_ERR
-			"pm_qos_param: network_throughput setup failed\n");
-
-	return ret;
-}
-
-late_initcall(pm_qos_power_init);