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/*

 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org

 *

 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.

 * All Rights Reserved.

 *

 * Author Rickard E. (Rik) Faith 

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice (including the next

 * paragraph) shall be included in all copies or substantial portions of the

 * Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR

 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

 * DEALINGS IN THE SOFTWARE.

 */

#include 

#include 

#include 

#include 

#include 

#include 

struct va_format {

    const char *fmt;

    va_list *va;

};

unsigned int drm_debug = 0;	/* 1 to enable debug output */

EXPORT_SYMBOL(drm_debug);

unsigned int drm_rnodes = 0;	/* 1 to enable experimental render nodes API */

EXPORT_SYMBOL(drm_rnodes);

/* 1 to allow user space to request universal planes (experimental) */

unsigned int drm_universal_planes = 0;

EXPORT_SYMBOL(drm_universal_planes);

unsigned int drm_vblank_offdelay = 5000;    /* Default to 5000 msecs. */

EXPORT_SYMBOL(drm_vblank_offdelay);

unsigned int drm_timestamp_precision = 20;  /* Default to 20 usecs. */

EXPORT_SYMBOL(drm_timestamp_precision);

/*

 * Default to use monotonic timestamps for wait-for-vblank and page-flip

 * complete events.

 */

unsigned int drm_timestamp_monotonic = 1;

struct idr drm_minors_idr;

int drm_err(const char *func, const char *format, ...)

{

	struct va_format vaf;

	va_list args;

	int r;

	va_start(args, format);

	vaf.fmt = format;

	vaf.va = &args;

	r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);

	va_end(args);

	return r;

}

EXPORT_SYMBOL(drm_err);

void drm_ut_debug_printk(const char *function_name, const char *format, ...)

{

	struct va_format vaf;

	va_list args;

//   if (drm_debug & request_level) {

//       if (function_name)

//           printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);

//       va_start(args, format);

//       vprintk(format, args);

//       va_end(args);

//   }

}

EXPORT_SYMBOL(drm_ut_debug_printk);

#if 0

struct drm_master *drm_master_create(struct drm_minor *minor)

{

	struct drm_master *master;

	master = kzalloc(sizeof(*master), GFP_KERNEL);

	if (!master)

		return NULL;

	kref_init(&master->refcount);

	spin_lock_init(&master->lock.spinlock);

	init_waitqueue_head(&master->lock.lock_queue);

	if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) {

		kfree(master);

		return NULL;

	}

	INIT_LIST_HEAD(&master->magicfree);

	master->minor = minor;

	return master;

}

struct drm_master *drm_master_get(struct drm_master *master)

{

	kref_get(&master->refcount);

	return master;

}

EXPORT_SYMBOL(drm_master_get);

static void drm_master_destroy(struct kref *kref)

{

	struct drm_master *master = container_of(kref, struct drm_master, refcount);

	struct drm_magic_entry *pt, *next;

	struct drm_device *dev = master->minor->dev;

	struct drm_map_list *r_list, *list_temp;

	mutex_lock(&dev->struct_mutex);

	if (dev->driver->master_destroy)

		dev->driver->master_destroy(dev, master);

	list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {

		if (r_list->master == master) {

			drm_rmmap_locked(dev, r_list->map);

			r_list = NULL;

		}

	}

	if (master->unique) {

		kfree(master->unique);

		master->unique = NULL;

		master->unique_len = 0;

	}

	list_for_each_entry_safe(pt, next, &master->magicfree, head) {

		list_del(&pt->head);

		drm_ht_remove_item(&master->magiclist, &pt->hash_item);

		kfree(pt);

	}

	drm_ht_remove(&master->magiclist);

	mutex_unlock(&dev->struct_mutex);

	kfree(master);

}

void drm_master_put(struct drm_master **master)

{

	kref_put(&(*master)->refcount, drm_master_destroy);

	*master = NULL;

}

EXPORT_SYMBOL(drm_master_put);

int drm_setmaster_ioctl(struct drm_device *dev, void *data,

			struct drm_file *file_priv)

{

	int ret = 0;

	mutex_lock(&dev->master_mutex);

	if (file_priv->is_master)

		goto out_unlock;

	if (file_priv->minor->master) {

		ret = -EINVAL;

		goto out_unlock;

	}

	if (!file_priv->master) {

		ret = -EINVAL;

		goto out_unlock;

	}

	file_priv->minor->master = drm_master_get(file_priv->master);

	file_priv->is_master = 1;

	if (dev->driver->master_set) {

		ret = dev->driver->master_set(dev, file_priv, false);

		if (unlikely(ret != 0)) {

			file_priv->is_master = 0;

			drm_master_put(&file_priv->minor->master);

		}

	}

out_unlock:

	mutex_unlock(&dev->master_mutex);

	return ret;

}

int drm_dropmaster_ioctl(struct drm_device *dev, void *data,

			 struct drm_file *file_priv)

{

	int ret = -EINVAL;

	mutex_lock(&dev->master_mutex);

	if (!file_priv->is_master)

		goto out_unlock;

	if (!file_priv->minor->master)

		goto out_unlock;

	ret = 0;

	if (dev->driver->master_drop)

		dev->driver->master_drop(dev, file_priv, false);

	drm_master_put(&file_priv->minor->master);

	file_priv->is_master = 0;

out_unlock:

	mutex_unlock(&dev->master_mutex);

	return ret;

}

/*

 * DRM Minors

 * A DRM device can provide several char-dev interfaces on the DRM-Major. Each

 * of them is represented by a drm_minor object. Depending on the capabilities

 * of the device-driver, different interfaces are registered.

 *

 * Minors can be accessed via dev->$minor_name. This pointer is either

 * NULL or a valid drm_minor pointer and stays valid as long as the device is

 * valid. This means, DRM minors have the same life-time as the underlying

 * device. However, this doesn't mean that the minor is active. Minors are

 * registered and unregistered dynamically according to device-state.

 */

static struct drm_minor **drm_minor_get_slot(struct drm_device *dev,

					     unsigned int type)

{

	switch (type) {

	case DRM_MINOR_LEGACY:

		return &dev->primary;

	case DRM_MINOR_RENDER:

		return &dev->render;

	case DRM_MINOR_CONTROL:

		return &dev->control;

	default:

		return NULL;

	}

}

static int drm_minor_alloc(struct drm_device *dev, unsigned int type)

{

	struct drm_minor *minor;