litmus-rt.git - The LITMUS^RT kernel.

The LITMUS^RT kernel.

Bjoern Brandenburg

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author	Wanlong Gao <wanlong.gao@gmail.com>	2011-04-10 02:14:43 -0400
committer	Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>	2011-04-13 09:46:37 -0400
commit	8faf9e3838c31c426e6203cb7dc6fc0f0bdb8b7e (patch)
tree	f9d9782e97904918c5080d5ce973269de86f762d /lib/dynamic_debug.c
parent	aaa119a3d4e0b7421c82ae3fbe288e65d0f3485f (diff)

fix the wrong argument of the functions definition

The functions of eic_chip's memebers use the wrong argument . Signed-off-by: Wanlong Gao <wanlong.gao@gmail.com> Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>

Diffstat (limited to 'lib/dynamic_debug.c')

0 files changed, 0 insertions, 0 deletions

8 -0400 committer Rafael J. Wysocki <rjw@sisk.pl> 2010-07-18 20:00:18 -0400 pm_qos: Reimplement using plists' href='/cgit/cgit.cgi/litmus-rt-imx6.git/commit/kernel/pm_qos_params.c?id=5f279845f9d684661563894d44729a0c706375b4'>5f279845f9d6

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/*
 * 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
 */
enum pm_qos_type {
	PM_QOS_MAX,		/* return the largest value */
	PM_QOS_MIN		/* return the smallest value */
};

struct pm_qos_object {
	struct plist_head requests;
	struct blocking_notifier_head *notifiers;
	struct miscdevice pm_qos_power_miscdev;
	char *name;
	s32 default_value;
	enum pm_qos_type type;
};

static DEFINE_SPINLOCK(pm_qos_lock);

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 = PLIST_HEAD_INIT(cpu_dma_pm_qos.requests, pm_qos_lock),
	.notifiers = &cpu_dma_lat_notifier,
	.name = "cpu_dma_latency",
	.default_value = 2000 * USEC_PER_SEC,
	.type = PM_QOS_MIN,
};

static BLOCKING_NOTIFIER_HEAD(network_lat_notifier);
static struct pm_qos_object network_lat_pm_qos = {
	.requests = PLIST_HEAD_INIT(network_lat_pm_qos.requests, pm_qos_lock),
	.notifiers = &network_lat_notifier,
	.name = "network_latency",
	.default_value = 2000 * USEC_PER_SEC,
	.type = PM_QOS_MIN
};


static BLOCKING_NOTIFIER_HEAD(network_throughput_notifier);
static struct pm_qos_object network_throughput_pm_qos = {
	.requests = PLIST_HEAD_INIT(network_throughput_pm_qos.requests, pm_qos_lock),
	.notifiers = &network_throughput_notifier,
	.name = "network_throughput",
	.default_value = 0,
	.type = PM_QOS_MAX,
};


static struct pm_qos_object *pm_qos_array[] = {
	&null_pm_qos,
	&cpu_dma_pm_qos,
	&network_lat_pm_qos,
	&network_throughput_pm_qos
};

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,
	.llseek = noop_llseek,
};

/* unlocked internal variant */
static inline int pm_qos_get_value(struct pm_qos_object *o)
{
	if (plist_head_empty(&o->requests))
		return o->default_value;

	switch (o->type) {
	case PM_QOS_MIN:
		return plist_first(&o->requests)->prio;

	case PM_QOS_MAX:
		return plist_last(&o->requests)->prio;

	default:
		/* runtime check for not using enum */
		BUG();
	}
}

static void update_target(struct pm_qos_object *o, struct plist_node *node,
			  int del, int value)
{
	unsigned long flags;
	int prev_value, curr_value;

	spin_lock_irqsave(&pm_qos_lock, flags);
	prev_value = pm_qos_get_value(o);


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