Merge branch 'drm-minor' of git://people.freedesktop.org/~dvdhrm/linux into drm-next

	DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",

		  task_pid_nr(current),

		  (long)old_encode_dev(file_priv->minor->device),

		  (long)old_encode_dev(file_priv->minor->kdev->devt),

		  file_priv->authenticated, ioctl->name);

	/* Do not trust userspace, use our own definition */

	if (!ioctl)

		DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",

			  task_pid_nr(current),

			  (long)old_encode_dev(file_priv->minor->device),

			  (long)old_encode_dev(file_priv->minor->kdev->devt),

			  file_priv->authenticated, cmd, nr);

	if (kdata != stack_kdata)

#include <linux/slab.h>

#include <linux/module.h>

/* from BKL pushdown: note that nothing else serializes idr_find() */

/* from BKL pushdown */

DEFINE_MUTEX(drm_global_mutex);

EXPORT_SYMBOL(drm_global_mutex);

static int drm_open_helper(struct inode *inode, struct file *filp,

			   struct drm_device * dev);

			   struct drm_minor *minor);

static int drm_setup(struct drm_device * dev)

{

 */

int drm_open(struct inode *inode, struct file *filp)

{

	struct drm_device *dev = NULL;

	int minor_id = iminor(inode);

	struct drm_device *dev;

	struct drm_minor *minor;

	int retcode = 0;

	int retcode;

	int need_setup = 0;

	struct address_space *old_mapping;

	struct address_space *old_imapping;

	minor = idr_find(&drm_minors_idr, minor_id);

	if (!minor)

		return -ENODEV;

	if (!(dev = minor->dev))

		return -ENODEV;

	if (drm_device_is_unplugged(dev))

		return -ENODEV;

	minor = drm_minor_acquire(iminor(inode));

	if (IS_ERR(minor))

		return PTR_ERR(minor);

	dev = minor->dev;

	if (!dev->open_count++)

		need_setup = 1;

	mutex_lock(&dev->struct_mutex);

	filp->f_mapping = dev->dev_mapping;

	mutex_unlock(&dev->struct_mutex);

	retcode = drm_open_helper(inode, filp, dev);

	retcode = drm_open_helper(inode, filp, minor);

	if (retcode)

		goto err_undo;

	if (need_setup) {

	dev->dev_mapping = old_mapping;

	mutex_unlock(&dev->struct_mutex);

	dev->open_count--;

	drm_minor_release(minor);

	return retcode;

}

EXPORT_SYMBOL(drm_open);

 */

int drm_stub_open(struct inode *inode, struct file *filp)

{

	struct drm_device *dev = NULL;

	struct drm_device *dev;

	struct drm_minor *minor;

	int minor_id = iminor(inode);

	int err = -ENODEV;

	const struct file_operations *new_fops;

	DRM_DEBUG("\n");

	mutex_lock(&drm_global_mutex);

	minor = idr_find(&drm_minors_idr, minor_id);

	if (!minor)

		goto out;

	if (!(dev = minor->dev))

		goto out;

	if (drm_device_is_unplugged(dev))

		goto out;

	minor = drm_minor_acquire(iminor(inode));

	if (IS_ERR(minor))

		goto out_unlock;

	dev = minor->dev;

	new_fops = fops_get(dev->driver->fops);

	if (!new_fops)

		goto out;

		goto out_release;

	replace_fops(filp, new_fops);

	if (filp->f_op->open)

		err = filp->f_op->open(inode, filp);

out:

out_release:

	drm_minor_release(minor);

out_unlock:

	mutex_unlock(&drm_global_mutex);

	return err;

}

 *

 * \param inode device inode.

 * \param filp file pointer.

 * \param dev device.

 * \param minor acquired minor-object.

 * \return zero on success or a negative number on failure.

 *

 * Creates and initializes a drm_file structure for the file private data in \p

 * filp and add it into the double linked list in \p dev.

 */

static int drm_open_helper(struct inode *inode, struct file *filp,

			   struct drm_device * dev)

			   struct drm_minor *minor)

{

	int minor_id = iminor(inode);

	struct drm_device *dev = minor->dev;

	struct drm_file *priv;

	int ret;

	if (dev->switch_power_state != DRM_SWITCH_POWER_ON && dev->switch_power_state != DRM_SWITCH_POWER_DYNAMIC_OFF)

		return -EINVAL;

	DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id);

	DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor->index);

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

	if (!priv)

	priv->filp = filp;

	priv->uid = current_euid();

	priv->pid = get_pid(task_pid(current));

	priv->minor = idr_find(&drm_minors_idr, minor_id);

	if (!priv->minor) {

		ret = -ENODEV;

		goto out_put_pid;

	}

	priv->minor = minor;

	/* for compatibility root is always authenticated */

	priv->always_authenticated = capable(CAP_SYS_ADMIN);

		drm_prime_destroy_file_private(&priv->prime);

	if (dev->driver->driver_features & DRIVER_GEM)

		drm_gem_release(dev, priv);

out_put_pid:

	put_pid(priv->pid);

	kfree(priv);

	filp->private_data = NULL;

int drm_release(struct inode *inode, struct file *filp)

{

	struct drm_file *file_priv = filp->private_data;

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

	struct drm_minor *minor = file_priv->minor;

	struct drm_device *dev = minor->dev;

	int retcode = 0;

	mutex_lock(&drm_global_mutex);

	DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",

		  task_pid_nr(current),

		  (long)old_encode_dev(file_priv->minor->device),

		  (long)old_encode_dev(file_priv->minor->kdev->devt),

		  dev->open_count);

	/* Release any auth tokens that might point to this file_priv,

	}

	mutex_unlock(&drm_global_mutex);

	drm_minor_release(minor);

	return retcode;

}

EXPORT_SYMBOL(drm_release);

	drm_pci_agp_destroy(dev);

	pci_disable_device(pdev);

err_free:

	drm_dev_free(dev);

	drm_dev_unref(dev);

	return ret;

}

EXPORT_SYMBOL(drm_get_pci_dev);

	return 0;

err_free:

	drm_dev_free(dev);

	drm_dev_unref(dev);

	return ret;

}

module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);

module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600);

static DEFINE_SPINLOCK(drm_minor_lock);

struct idr drm_minors_idr;

struct class *drm_class;

}

EXPORT_SYMBOL(drm_ut_debug_printk);

static int drm_minor_get_id(struct drm_device *dev, int type)

{

	int ret;

	int base = 0, limit = 63;

	if (type == DRM_MINOR_CONTROL) {

		base += 64;

		limit = base + 63;

	} else if (type == DRM_MINOR_RENDER) {

		base += 128;

		limit = base + 63;

	}

	mutex_lock(&dev->struct_mutex);

	ret = idr_alloc(&drm_minors_idr, NULL, base, limit, GFP_KERNEL);

	mutex_unlock(&dev->struct_mutex);

	return ret == -ENOSPC ? -EINVAL : ret;

}

struct drm_master *drm_master_create(struct drm_minor *minor)

{

	struct drm_master *master;

	return 0;

}

/**

 * drm_get_minor - Allocate and register new DRM minor

 * @dev: DRM device

 * @minor: Pointer to where new minor is stored

 * @type: Type of minor

 *

 * Allocate a new minor of the given type and register it. A pointer to the new

 * minor is returned in @minor.

 * Caller must hold the global DRM mutex.

/*

 * 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.

 *

 * RETURNS:

 * 0 on success, negative error code on failure.

 * 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 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor,

			 int type)

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;

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

	if (!minor)

		return -ENOMEM;

	minor->type = type;

	minor->dev = dev;

	INIT_LIST_HEAD(&minor->master_list);

	*drm_minor_get_slot(dev, type) = minor;

	return 0;

}

static void drm_minor_free(struct drm_device *dev, unsigned int type)

{

	struct drm_minor **slot;

	slot = drm_minor_get_slot(dev, type);

	if (*slot) {

		kfree(*slot);

		*slot = NULL;

	}

}

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

{

	struct drm_minor *new_minor;

	unsigned long flags;

	int ret;

	int minor_id;

	DRM_DEBUG("\n");

	minor_id = drm_minor_get_id(dev, type);

	new_minor = *drm_minor_get_slot(dev, type);

	if (!new_minor)

		return 0;

	idr_preload(GFP_KERNEL);

	spin_lock_irqsave(&drm_minor_lock, flags);

	minor_id = idr_alloc(&drm_minors_idr,

			     NULL,

			     64 * type,

			     64 * (type + 1),

			     GFP_NOWAIT);

	spin_unlock_irqrestore(&drm_minor_lock, flags);

	idr_preload_end();

	if (minor_id < 0)

		return minor_id;

	new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);

	if (!new_minor) {

		ret = -ENOMEM;

		goto err_idr;

	}

	new_minor->type = type;

	new_minor->device = MKDEV(DRM_MAJOR, minor_id);

	new_minor->dev = dev;

	new_minor->index = minor_id;

	INIT_LIST_HEAD(&new_minor->master_list);

	idr_replace(&drm_minors_idr, new_minor, minor_id);

#if defined(CONFIG_DEBUG_FS)

	ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);

	if (ret) {

		DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");

		goto err_mem;

		goto err_id;

	}

#endif

	ret = drm_sysfs_device_add(new_minor);

	if (ret) {

		printk(KERN_ERR

		       "DRM: Error sysfs_device_add.\n");

		DRM_ERROR("DRM: Error sysfs_device_add.\n");

		goto err_debugfs;

	}

	*minor = new_minor;

	/* replace NULL with @minor so lookups will succeed from now on */

	spin_lock_irqsave(&drm_minor_lock, flags);

	idr_replace(&drm_minors_idr, new_minor, new_minor->index);

	spin_unlock_irqrestore(&drm_minor_lock, flags);

	DRM_DEBUG("new minor assigned %d\n", minor_id);

	return 0;

err_debugfs:

#if defined(CONFIG_DEBUG_FS)

	drm_debugfs_cleanup(new_minor);

err_mem:

#endif

	kfree(new_minor);

err_idr:

err_id:

	spin_lock_irqsave(&drm_minor_lock, flags);

	idr_remove(&drm_minors_idr, minor_id);

	*minor = NULL;

	spin_unlock_irqrestore(&drm_minor_lock, flags);

	new_minor->index = 0;

	return ret;

}

/**

 * drm_unplug_minor - Unplug DRM minor

 * @minor: Minor to unplug

 *

 * Unplugs the given DRM minor but keeps the object. So after this returns,

 * minor->dev is still valid so existing open-files can still access it to get

 * device information from their drm_file ojects.

 * If the minor is already unplugged or if @minor is NULL, nothing is done.

 * The global DRM mutex must be held by the caller.

 */

static void drm_unplug_minor(struct drm_minor *minor)

static void drm_minor_unregister(struct drm_device *dev, unsigned int type)

{

	struct drm_minor *minor;

	unsigned long flags;

	minor = *drm_minor_get_slot(dev, type);

	if (!minor || !minor->kdev)

		return;

#if defined(CONFIG_DEBUG_FS)

	drm_debugfs_cleanup(minor);

#endif

	spin_lock_irqsave(&drm_minor_lock, flags);

	idr_remove(&drm_minors_idr, minor->index);

	spin_unlock_irqrestore(&drm_minor_lock, flags);

	minor->index = 0;

	drm_debugfs_cleanup(minor);

	drm_sysfs_device_remove(minor);

	idr_remove(&drm_minors_idr, minor->index);

}

/**

 * drm_put_minor - Destroy DRM minor

 * @minor: Minor to destroy

 * drm_minor_acquire - Acquire a DRM minor

 * @minor_id: Minor ID of the DRM-minor

 *

 * Looks up the given minor-ID and returns the respective DRM-minor object. The

 * refence-count of the underlying device is increased so you must release this

 * object with drm_minor_release().

 *

 * This calls drm_unplug_minor() on the given minor and then frees it. Nothing

 * is done if @minor is NULL. It is fine to call this on already unplugged

 * minors.

 * The global DRM mutex must be held by the caller.

 * As long as you hold this minor, it is guaranteed that the object and the

 * minor->dev pointer will stay valid! However, the device may get unplugged and

 * unregistered while you hold the minor.

 *

 * Returns:

 * Pointer to minor-object with increased device-refcount, or PTR_ERR on

 * failure.

 */

static void drm_put_minor(struct drm_minor *minor)

struct drm_minor *drm_minor_acquire(unsigned int minor_id)

{

	if (!minor)

		return;

	struct drm_minor *minor;

	unsigned long flags;

	DRM_DEBUG("release secondary minor %d\n", minor->index);

	spin_lock_irqsave(&drm_minor_lock, flags);

	minor = idr_find(&drm_minors_idr, minor_id);

	if (minor)

		drm_dev_ref(minor->dev);

	spin_unlock_irqrestore(&drm_minor_lock, flags);

	drm_unplug_minor(minor);

	kfree(minor);

	if (!minor) {

		return ERR_PTR(-ENODEV);

	} else if (drm_device_is_unplugged(minor->dev)) {

		drm_dev_unref(minor->dev);

		return ERR_PTR(-ENODEV);

	}

	return minor;

}

/**

 * drm_minor_release - Release DRM minor

 * @minor: Pointer to DRM minor object

 *

 * Release a minor that was previously acquired via drm_minor_acquire().

 */

void drm_minor_release(struct drm_minor *minor)

{

	drm_dev_unref(minor->dev);

}

/**

	}

	drm_dev_unregister(dev);

	drm_dev_free(dev);

	drm_dev_unref(dev);

}

EXPORT_SYMBOL(drm_put_dev);

void drm_unplug_dev(struct drm_device *dev)

{

	/* for a USB device */

	if (drm_core_check_feature(dev, DRIVER_MODESET))

		drm_unplug_minor(dev->control);

	if (dev->render)

		drm_unplug_minor(dev->render);

	drm_unplug_minor(dev->primary);

	drm_minor_unregister(dev, DRM_MINOR_LEGACY);

	drm_minor_unregister(dev, DRM_MINOR_RENDER);

	drm_minor_unregister(dev, DRM_MINOR_CONTROL);

	mutex_lock(&drm_global_mutex);

 * Call drm_dev_register() to advertice the device to user space and register it

 * with other core subsystems.

 *

 * The initial ref-count of the object is 1. Use drm_dev_ref() and

 * drm_dev_unref() to take and drop further ref-counts.

 *

 * RETURNS:

 * Pointer to new DRM device, or NULL if out of memory.

 */

	if (!dev)

		return NULL;

	kref_init(&dev->ref);

	dev->dev = parent;

	dev->driver = driver;

	mutex_init(&dev->struct_mutex);

	mutex_init(&dev->ctxlist_mutex);

	if (drm_core_check_feature(dev, DRIVER_MODESET)) {

		ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL);

		if (ret)

			goto err_minors;

	}

	if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) {

		ret = drm_minor_alloc(dev, DRM_MINOR_RENDER);

		if (ret)

			goto err_minors;

	}

	ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY);

	if (ret)

		goto err_minors;

	if (drm_ht_create(&dev->map_hash, 12))

		goto err_free;

		goto err_minors;

	ret = drm_ctxbitmap_init(dev);

	if (ret) {

	drm_ctxbitmap_cleanup(dev);

err_ht:

	drm_ht_remove(&dev->map_hash);

err_free:

err_minors:

	drm_minor_free(dev, DRM_MINOR_LEGACY);

	drm_minor_free(dev, DRM_MINOR_RENDER);

	drm_minor_free(dev, DRM_MINOR_CONTROL);

	kfree(dev);

	return NULL;

}

EXPORT_SYMBOL(drm_dev_alloc);

/**

 * drm_dev_free - Free DRM device

 * @dev: DRM device to free

 *

 * Free a DRM device that has previously been allocated via drm_dev_alloc().

 * You must not use kfree() instead or you will leak memory.

 *

 * This must not be called once the device got registered. Use drm_put_dev()

 * instead, which then calls drm_dev_free().

 */

void drm_dev_free(struct drm_device *dev)

static void drm_dev_release(struct kref *ref)

{

	drm_put_minor(dev->control);

	drm_put_minor(dev->render);

	drm_put_minor(dev->primary);

	struct drm_device *dev = container_of(ref, struct drm_device, ref);

	if (dev->driver->driver_features & DRIVER_GEM)

		drm_gem_destroy(dev);

	drm_ctxbitmap_cleanup(dev);

	drm_ht_remove(&dev->map_hash);

	drm_minor_free(dev, DRM_MINOR_LEGACY);

	drm_minor_free(dev, DRM_MINOR_RENDER);

	drm_minor_free(dev, DRM_MINOR_CONTROL);

	kfree(dev->devname);

	kfree(dev);

}

EXPORT_SYMBOL(drm_dev_free);

/**

 * drm_dev_ref - Take reference of a DRM device

 * @dev: device to take reference of or NULL

 *

 * This increases the ref-count of @dev by one. You *must* already own a

 * reference when calling this. Use drm_dev_unref() to drop this reference

 * again.

 *

 * This function never fails. However, this function does not provide *any*

 * guarantee whether the device is alive or running. It only provides a

 * reference to the object and the memory associated with it.

 */

void drm_dev_ref(struct drm_device *dev)

{

	if (dev)

		kref_get(&dev->ref);

}

EXPORT_SYMBOL(drm_dev_ref);

/**

 * drm_dev_unref - Drop reference of a DRM device

 * @dev: device to drop reference of or NULL

 *

 * This decreases the ref-count of @dev by one. The device is destroyed if the

 * ref-count drops to zero.

 */

void drm_dev_unref(struct drm_device *dev)

{

	if (dev)

		kref_put(&dev->ref, drm_dev_release);

}

EXPORT_SYMBOL(drm_dev_unref);

/**

 * drm_dev_register - Register DRM device

	mutex_lock(&drm_global_mutex);

	if (drm_core_check_feature(dev, DRIVER_MODESET)) {

		ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);

	ret = drm_minor_register(dev, DRM_MINOR_CONTROL);

	if (ret)

			goto out_unlock;

	}

		goto err_minors;

	if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) {

		ret = drm_get_minor(dev, &dev->render, DRM_MINOR_RENDER);