[net-next-2.6.git] / drivers / gpu / drm / drm_stub.c

/**
 * \file drm_stub.h
 * Stub support
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 */

/*
 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
 *
 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
 * All Rights Reserved.
 *
 * 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 <linux/module.h>
#include <linux/moduleparam.h>
#include "drmP.h"
#include "drm_core.h"

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

MODULE_AUTHOR(CORE_AUTHOR);
MODULE_DESCRIPTION(CORE_DESC);
MODULE_LICENSE("GPL and additional rights");
MODULE_PARM_DESC(debug, "Enable debug output");

module_param_named(debug, drm_debug, int, 0600);

struct idr drm_minors_idr;

struct class *drm_class;
struct proc_dir_entry *drm_proc_root;

static int drm_minor_get_id(struct drm_device *dev, int type)
{
	int new_id;
	int ret;
	int base = 0, limit = 63;

again:
	if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
		DRM_ERROR("Out of memory expanding drawable idr\n");
		return -ENOMEM;
	}
	mutex_lock(&dev->struct_mutex);
	ret = idr_get_new_above(&drm_minors_idr, NULL,
				base, &new_id);
	mutex_unlock(&dev->struct_mutex);
	if (ret == -EAGAIN) {
		goto again;
	} else if (ret) {
		return ret;
	}

	if (new_id >= limit) {
		idr_remove(&drm_minors_idr, new_id);
		return -EINVAL;
	}
	return new_id;
}

struct drm_master *drm_master_create(struct drm_minor *minor)
{
	struct drm_master *master;

	master = drm_calloc(1, sizeof(*master), DRM_MEM_DRIVER);
	if (!master)
		return NULL;

	kref_init(&master->refcount);
	spin_lock_init(&master->lock.spinlock);
	init_waitqueue_head(&master->lock.lock_queue);
	drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
	INIT_LIST_HEAD(&master->magicfree);
	master->minor = minor;

	list_add_tail(&master->head, &minor->master_list);

	return master;
}

struct drm_master *drm_master_get(struct drm_master *master)
{
	kref_get(&master->refcount);
	return master;
}

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;

	list_del(&master->head);

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

	if (master->unique) {
		drm_free(master->unique, master->unique_size, DRM_MEM_DRIVER);
		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);
		drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
	}

	drm_ht_remove(&master->magiclist);

	if (master->lock.hw_lock) {
		if (dev->sigdata.lock == master->lock.hw_lock)
			dev->sigdata.lock = NULL;
		master->lock.hw_lock = NULL;
		master->lock.file_priv = NULL;
		wake_up_interruptible(&master->lock.lock_queue);
	}

	drm_free(master, sizeof(*master), DRM_MEM_DRIVER);
}

void drm_master_put(struct drm_master **master)
{
	kref_put(&(*master)->refcount, drm_master_destroy);
	*master = NULL;
}

int drm_setmaster_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv)
{
	if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
		return -EINVAL;

	if (!file_priv->master)
		return -EINVAL;

	if (!file_priv->minor->master &&
	    file_priv->minor->master != file_priv->master) {
		mutex_lock(&dev->struct_mutex);
		file_priv->minor->master = drm_master_get(file_priv->master);
		mutex_lock(&dev->struct_mutex);
	}

	return 0;
}

int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
			 struct drm_file *file_priv)
{
	if (!file_priv->master)
		return -EINVAL;
	mutex_lock(&dev->struct_mutex);
	drm_master_put(&file_priv->minor->master);
	mutex_unlock(&dev->struct_mutex);
	return 0;
}

static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
			   const struct pci_device_id *ent,
			   struct drm_driver *driver)
{
	int retcode;

	INIT_LIST_HEAD(&dev->filelist);
	INIT_LIST_HEAD(&dev->ctxlist);
	INIT_LIST_HEAD(&dev->vmalist);
	INIT_LIST_HEAD(&dev->maplist);

	spin_lock_init(&dev->count_lock);
	spin_lock_init(&dev->drw_lock);
	init_timer(&dev->timer);
	mutex_init(&dev->struct_mutex);
	mutex_init(&dev->ctxlist_mutex);

	idr_init(&dev->drw_idr);

	dev->pdev = pdev;
	dev->pci_device = pdev->device;
	dev->pci_vendor = pdev->vendor;

#ifdef __alpha__
	dev->hose = pdev->sysdata;
#endif

	if (drm_ht_create(&dev->map_hash, 12)) {
		return -ENOMEM;
	}

	/* the DRM has 6 basic counters */
	dev->counters = 6;
	dev->types[0] = _DRM_STAT_LOCK;
	dev->types[1] = _DRM_STAT_OPENS;
	dev->types[2] = _DRM_STAT_CLOSES;
	dev->types[3] = _DRM_STAT_IOCTLS;
	dev->types[4] = _DRM_STAT_LOCKS;
	dev->types[5] = _DRM_STAT_UNLOCKS;

	dev->driver = driver;

	if (drm_core_has_AGP(dev)) {
		if (drm_device_is_agp(dev))
			dev->agp = drm_agp_init(dev);
		if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
		    && (dev->agp == NULL)) {
			DRM_ERROR("Cannot initialize the agpgart module.\n");
			retcode = -EINVAL;
			goto error_out_unreg;
		}
		if (drm_core_has_MTRR(dev)) {
			if (dev->agp)
				dev->agp->agp_mtrr =
				    mtrr_add(dev->agp->agp_info.aper_base,
					     dev->agp->agp_info.aper_size *
					     1024 * 1024, MTRR_TYPE_WRCOMB, 1);
		}
	}

	if (dev->driver->load)
		if ((retcode = dev->driver->load(dev, ent->driver_data)))
			goto error_out_unreg;

	retcode = drm_ctxbitmap_init(dev);
	if (retcode) {
		DRM_ERROR("Cannot allocate memory for context bitmap.\n");
		goto error_out_unreg;
	}

	if (driver->driver_features & DRIVER_GEM) {
		retcode = drm_gem_init(dev);
		if (retcode) {
			DRM_ERROR("Cannot initialize graphics execution "
				  "manager (GEM)\n");
			goto error_out_unreg;
		}
	}

	return 0;

      error_out_unreg:
	drm_lastclose(dev);
	return retcode;
}


/**
 * Get a secondary minor number.
 *
 * \param dev device data structure
 * \param sec-minor structure to hold the assigned minor
 * \return negative number on failure.
 *
 * Search an empty entry and initialize it to the given parameters, and
 * create the proc init entry via proc_init(). This routines assigns
 * minor numbers to secondary heads of multi-headed cards
 */
static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
{
	struct drm_minor *new_minor;
	int ret;
	int minor_id;

	DRM_DEBUG("\n");

	minor_id = drm_minor_get_id(dev, type);
	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 (type == DRM_MINOR_LEGACY) {
		ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
		if (ret) {
			DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
			goto err_mem;
		}
	} else
		new_minor->dev_root = NULL;

	ret = drm_sysfs_device_add(new_minor);
	if (ret) {
		printk(KERN_ERR
		       "DRM: Error sysfs_device_add.\n");
		goto err_g2;
	}
	*minor = new_minor;

	DRM_DEBUG("new minor assigned %d\n", minor_id);
	return 0;


err_g2:
	if (new_minor->type == DRM_MINOR_LEGACY)
		drm_proc_cleanup(new_minor, drm_proc_root);
err_mem:
	kfree(new_minor);
err_idr:
	idr_remove(&drm_minors_idr, minor_id);
	*minor = NULL;
	return ret;
}

/**
 * Register.
 *
 * \param pdev - PCI device structure
 * \param ent entry from the PCI ID table with device type flags
 * \return zero on success or a negative number on failure.
 *
 * Attempt to gets inter module "drm" information. If we are first
 * then register the character device and inter module information.
 * Try and register, if we fail to register, backout previous work.
 */
int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
		struct drm_driver *driver)
{
	struct drm_device *dev;
	int ret;

	DRM_DEBUG("\n");

	dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
	if (!dev)
		return -ENOMEM;

	ret = pci_enable_device(pdev);
	if (ret)
		goto err_g1;

	pci_set_master(pdev);
	if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
		printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
		goto err_g2;
	}
	if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
		goto err_g2;

	list_add_tail(&dev->driver_item, &driver->device_list);

	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
		 driver->name, driver->major, driver->minor, driver->patchlevel,
		 driver->date, dev->primary->index);

	return 0;

err_g2:
	pci_disable_device(pdev);
err_g1:
	drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
	return ret;
}

/**
 * Put a device minor number.
 *
 * \param dev device data structure
 * \return always zero
 *
 * Cleans up the proc resources. If it is the last minor then release the foreign
 * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
 * unregisters the character device.
 */
int drm_put_dev(struct drm_device * dev)
{
	DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);

	if (dev->devname) {
		drm_free(dev->devname, strlen(dev->devname) + 1,
			 DRM_MEM_DRIVER);
		dev->devname = NULL;
	}
	drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
	return 0;
}

/**
 * Put a secondary minor number.
 *
 * \param sec_minor - structure to be released
 * \return always zero
 *
 * Cleans up the proc resources. Not legal for this to be the
 * last minor released.
 *
 */
int drm_put_minor(struct drm_minor **minor_p)
{
	struct drm_minor *minor = *minor_p;

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

	if (minor->type == DRM_MINOR_LEGACY)
		drm_proc_cleanup(minor, drm_proc_root);
	drm_sysfs_device_remove(minor);

	idr_remove(&drm_minors_idr, minor->index);

	kfree(minor);
	*minor_p = NULL;
	return 0;
}
Commit	Line	Data
1da177e4 LT	1	/**
	2	* \file drm_stub.h
	3	* Stub support
	4	*
	5	* \author Rickard E. (Rik) Faith <faith@valinux.com>
	6	*/
	7
	8	/*
	9	* Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
	10	*
	11	* Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
	12	* All Rights Reserved.
	13	*
	14	* Permission is hereby granted, free of charge, to any person obtaining a
	15	* copy of this software and associated documentation files (the "Software"),
	16	* to deal in the Software without restriction, including without limitation
	17	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	18	* and/or sell copies of the Software, and to permit persons to whom the
	19	* Software is furnished to do so, subject to the following conditions:
	20	*
	21	* The above copyright notice and this permission notice (including the next
	22	* paragraph) shall be included in all copies or substantial portions of the
	23	* Software.
	24	*
	25	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	26	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	27	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	28	* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
	29	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	30	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	31	* DEALINGS IN THE SOFTWARE.
	32	*/
	33
	34	#include <linux/module.h>
	35	#include <linux/moduleparam.h>
	36	#include "drmP.h"
	37	#include "drm_core.h"
	38
b5e89ed5	39	unsigned int drm_debug = 0; /* 1 to enable debug output */
1da177e4 LT	40	EXPORT_SYMBOL(drm_debug);
1da177e4 LT	41
b5e89ed5 DA	42	MODULE_AUTHOR(CORE_AUTHOR);
b5e89ed5 DA	43	MODULE_DESCRIPTION(CORE_DESC);
1da177e4	44	MODULE_LICENSE("GPL and additional rights");
1da177e4 LT	45	MODULE_PARM_DESC(debug, "Enable debug output");
1da177e4 LT	46
c0758146	47	module_param_named(debug, drm_debug, int, 0600);
1da177e4	48
2c14f28b DA	49	struct idr drm_minors_idr;
2c14f28b DA	50
0650fd58	51	struct class *drm_class;
1da177e4 LT	52	struct proc_dir_entry *drm_proc_root;
1da177e4 LT	53
2c14f28b DA	54	static int drm_minor_get_id(struct drm_device *dev, int type)
	55	{
	56	int new_id;
	57	int ret;
	58	int base = 0, limit = 63;
	59
	60	again:
	61	if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
	62	DRM_ERROR("Out of memory expanding drawable idr\n");
	63	return -ENOMEM;
	64	}
	65	mutex_lock(&dev->struct_mutex);
	66	ret = idr_get_new_above(&drm_minors_idr, NULL,
	67	base, &new_id);
	68	mutex_unlock(&dev->struct_mutex);
	69	if (ret == -EAGAIN) {
	70	goto again;
	71	} else if (ret) {
	72	return ret;
	73	}
	74
	75	if (new_id >= limit) {
	76	idr_remove(&drm_minors_idr, new_id);
	77	return -EINVAL;
	78	}
	79	return new_id;
	80	}
	81
7c1c2871 DA	82	struct drm_master drm_master_create(struct drm_minor minor)
	83	{
	84	struct drm_master *master;
	85
	86	master = drm_calloc(1, sizeof(*master), DRM_MEM_DRIVER);
	87	if (!master)
	88	return NULL;
	89
	90	kref_init(&master->refcount);
	91	spin_lock_init(&master->lock.spinlock);
	92	init_waitqueue_head(&master->lock.lock_queue);
	93	drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
	94	INIT_LIST_HEAD(&master->magicfree);
	95	master->minor = minor;
	96
	97	list_add_tail(&master->head, &minor->master_list);
	98
	99	return master;
	100	}
	101
	102	struct drm_master drm_master_get(struct drm_master master)
	103	{
	104	kref_get(&master->refcount);
	105	return master;
	106	}
	107
	108	static void drm_master_destroy(struct kref *kref)
	109	{
	110	struct drm_master *master = container_of(kref, struct drm_master, refcount);
	111	struct drm_magic_entry pt, next;
	112	struct drm_device *dev = master->minor->dev;
	113
	114	list_del(&master->head);
	115
	116	if (dev->driver->master_destroy)
	117	dev->driver->master_destroy(dev, master);
	118
	119	if (master->unique) {
1147c9cd	120	drm_free(master->unique, master->unique_size, DRM_MEM_DRIVER);
7c1c2871 DA	121	master->unique = NULL;
	122	master->unique_len = 0;
	123	}
	124
	125	list_for_each_entry_safe(pt, next, &master->magicfree, head) {
	126	list_del(&pt->head);
	127	drm_ht_remove_item(&master->magiclist, &pt->hash_item);
	128	drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
	129	}
	130
	131	drm_ht_remove(&master->magiclist);
	132
	133	if (master->lock.hw_lock) {
	134	if (dev->sigdata.lock == master->lock.hw_lock)
	135	dev->sigdata.lock = NULL;
	136	master->lock.hw_lock = NULL;
	137	master->lock.file_priv = NULL;
	138	wake_up_interruptible(&master->lock.lock_queue);
	139	}
	140
	141	drm_free(master, sizeof(*master), DRM_MEM_DRIVER);
	142	}
	143
	144	void drm_master_put(struct drm_master **master)
	145	{
	146	kref_put(&(*master)->refcount, drm_master_destroy);
	147	*master = NULL;
	148	}
	149
	150	int drm_setmaster_ioctl(struct drm_device dev, void data,
	151	struct drm_file *file_priv)
	152	{
	153	if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
	154	return -EINVAL;
	155
	156	if (!file_priv->master)
	157	return -EINVAL;
	158
	159	if (!file_priv->minor->master &&
	160	file_priv->minor->master != file_priv->master) {
	161	mutex_lock(&dev->struct_mutex);
	162	file_priv->minor->master = drm_master_get(file_priv->master);
	163	mutex_lock(&dev->struct_mutex);
	164	}
	165
	166	return 0;
	167	}
	168
	169	int drm_dropmaster_ioctl(struct drm_device dev, void data,
	170	struct drm_file *file_priv)
	171	{
	172	if (!file_priv->master)
	173	return -EINVAL;
	174	mutex_lock(&dev->struct_mutex);
	175	drm_master_put(&file_priv->minor->master);
	176	mutex_unlock(&dev->struct_mutex);
	177	return 0;
	178	}
	179
84b1fd10	180	static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
b5e89ed5 DA	181	const struct pci_device_id *ent,
b5e89ed5 DA	182	struct drm_driver *driver)
1da177e4 LT	183	{
	184	int retcode;
	185
bd1b331f	186	INIT_LIST_HEAD(&dev->filelist);
7c158ace DA	187	INIT_LIST_HEAD(&dev->ctxlist);
	188	INIT_LIST_HEAD(&dev->vmalist);
	189	INIT_LIST_HEAD(&dev->maplist);
	190
1da177e4	191	spin_lock_init(&dev->count_lock);
bea5679f	192	spin_lock_init(&dev->drw_lock);
b5e89ed5	193	init_timer(&dev->timer);
30e2fb18 DA	194	mutex_init(&dev->struct_mutex);
30e2fb18 DA	195	mutex_init(&dev->ctxlist_mutex);
1da177e4	196
45ea5dcd DA	197	idr_init(&dev->drw_idr);
45ea5dcd DA	198
b5e89ed5	199	dev->pdev = pdev;
2f02cc3f EA	200	dev->pci_device = pdev->device;
2f02cc3f EA	201	dev->pci_vendor = pdev->vendor;
1da177e4 LT	202
1da177e4 LT	203	#ifdef __alpha__
b5e89ed5	204	dev->hose = pdev->sysdata;
1da177e4	205	#endif
1da177e4	206
8d153f71	207	if (drm_ht_create(&dev->map_hash, 12)) {
8d153f71 TH	208	return -ENOMEM;
8d153f71 TH	209	}
836cf046	210
1da177e4 LT	211	/* the DRM has 6 basic counters */
1da177e4 LT	212	dev->counters = 6;
b5e89ed5 DA	213	dev->types[0] = _DRM_STAT_LOCK;
	214	dev->types[1] = _DRM_STAT_OPENS;
	215	dev->types[2] = _DRM_STAT_CLOSES;
	216	dev->types[3] = _DRM_STAT_IOCTLS;
	217	dev->types[4] = _DRM_STAT_LOCKS;
	218	dev->types[5] = _DRM_STAT_UNLOCKS;
1da177e4 LT	219
1da177e4 LT	220	dev->driver = driver;
b5e89ed5	221
1da177e4	222	if (drm_core_has_AGP(dev)) {
cda17380 DA	223	if (drm_device_is_agp(dev))
cda17380 DA	224	dev->agp = drm_agp_init(dev);
b5e89ed5 DA	225	if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
	226	&& (dev->agp == NULL)) {
	227	DRM_ERROR("Cannot initialize the agpgart module.\n");
1da177e4 LT	228	retcode = -EINVAL;
	229	goto error_out_unreg;
	230	}
	231	if (drm_core_has_MTRR(dev)) {
	232	if (dev->agp)
b5e89ed5 DA	233	dev->agp->agp_mtrr =
	234	mtrr_add(dev->agp->agp_info.aper_base,
	235	dev->agp->agp_info.aper_size *
	236	1024 * 1024, MTRR_TYPE_WRCOMB, 1);
1da177e4 LT	237	}
	238	}
	239
2716a02f DA	240	if (dev->driver->load)
	241	if ((retcode = dev->driver->load(dev, ent->driver_data)))
	242	goto error_out_unreg;
	243
b5e89ed5 DA	244	retcode = drm_ctxbitmap_init(dev);
	245	if (retcode) {
	246	DRM_ERROR("Cannot allocate memory for context bitmap.\n");
1da177e4 LT	247	goto error_out_unreg;
	248	}
	249
673a394b EA	250	if (driver->driver_features & DRIVER_GEM) {
	251	retcode = drm_gem_init(dev);
	252	if (retcode) {
	253	DRM_ERROR("Cannot initialize graphics execution "
	254	"manager (GEM)\n");
	255	goto error_out_unreg;
	256	}
	257	}
	258
1da177e4	259	return 0;
b5e89ed5 DA	260
b5e89ed5 DA	261	error_out_unreg:
22eae947	262	drm_lastclose(dev);
1da177e4 LT	263	return retcode;
	264	}
	265
1da177e4	266
1da177e4 LT	267	/**
	268	* Get a secondary minor number.
	269	*
	270	* \param dev device data structure
	271	* \param sec-minor structure to hold the assigned minor
	272	* \return negative number on failure.
	273	*
	274	* Search an empty entry and initialize it to the given parameters, and
	275	* create the proc init entry via proc_init(). This routines assigns
	276	* minor numbers to secondary heads of multi-headed cards
	277	*/
2c14f28b	278	static int drm_get_minor(struct drm_device dev, struct drm_minor *minor, int type)
1da177e4	279	{
2c14f28b	280	struct drm_minor *new_minor;
1da177e4	281	int ret;
2c14f28b	282	int minor_id;
1da177e4 LT	283
	284	DRM_DEBUG("\n");
	285
2c14f28b DA	286	minor_id = drm_minor_get_id(dev, type);
	287	if (minor_id < 0)
	288	return minor_id;
	289
	290	new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
	291	if (!new_minor) {
	292	ret = -ENOMEM;
	293	goto err_idr;
	294	}
	295
	296	new_minor->type = type;
	297	new_minor->device = MKDEV(DRM_MAJOR, minor_id);
	298	new_minor->dev = dev;
	299	new_minor->index = minor_id;
7c1c2871	300	INIT_LIST_HEAD(&new_minor->master_list);
2c14f28b DA	301
	302	idr_replace(&drm_minors_idr, new_minor, minor_id);
	303
	304	if (type == DRM_MINOR_LEGACY) {
	305	ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
	306	if (ret) {
	307	DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
	308	goto err_mem;
1da177e4	309	}
2c14f28b DA	310	} else
	311	new_minor->dev_root = NULL;
	312
	313	ret = drm_sysfs_device_add(new_minor);
	314	if (ret) {
	315	printk(KERN_ERR
	316	"DRM: Error sysfs_device_add.\n");
	317	goto err_g2;
1da177e4	318	}
2c14f28b DA	319	*minor = new_minor;
	320
	321	DRM_DEBUG("new minor assigned %d\n", minor_id);
	322	return 0;
	323
	324
	325	err_g2:
	326	if (new_minor->type == DRM_MINOR_LEGACY)
	327	drm_proc_cleanup(new_minor, drm_proc_root);
	328	err_mem:
	329	kfree(new_minor);
	330	err_idr:
	331	idr_remove(&drm_minors_idr, minor_id);
	332	*minor = NULL;
1da177e4 LT	333	return ret;
1da177e4 LT	334	}
b5e89ed5	335
c94f7029 DA	336	/**
	337	* Register.
	338	*
	339	* \param pdev - PCI device structure
	340	* \param ent entry from the PCI ID table with device type flags
	341	* \return zero on success or a negative number on failure.
	342	*
	343	* Attempt to gets inter module "drm" information. If we are first
	344	* then register the character device and inter module information.
	345	* Try and register, if we fail to register, backout previous work.
	346	*/
	347	int drm_get_dev(struct pci_dev pdev, const struct pci_device_id ent,
b5e89ed5	348	struct drm_driver *driver)
c94f7029	349	{
84b1fd10	350	struct drm_device *dev;
c94f7029 DA	351	int ret;
	352
	353	DRM_DEBUG("\n");
	354
	355	dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
	356	if (!dev)
	357	return -ENOMEM;
	358
2c3f0edd JG	359	ret = pci_enable_device(pdev);
	360	if (ret)
	361	goto err_g1;
c94f7029	362
19a8f59a	363	pci_set_master(pdev);
c94f7029 DA	364	if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
c94f7029 DA	365	printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
2c3f0edd	366	goto err_g2;
c94f7029	367	}
2c14f28b	368	if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
2c3f0edd	369	goto err_g2;
bc5f4523	370
e7f7ab45 DA	371	list_add_tail(&dev->driver_item, &driver->device_list);
e7f7ab45 DA	372
22eae947 DA	373	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
22eae947 DA	374	driver->name, driver->major, driver->minor, driver->patchlevel,
2c14f28b	375	driver->date, dev->primary->index);
c94f7029 DA	376
	377	return 0;
	378
2c3f0edd JG	379	err_g2:
	380	pci_disable_device(pdev);
	381	err_g1:
c94f7029 DA	382	drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
	383	return ret;
	384	}
b5e89ed5	385
1da177e4 LT	386	/**
	387	* Put a device minor number.
	388	*
	389	* \param dev device data structure
	390	* \return always zero
	391	*
	392	* Cleans up the proc resources. If it is the last minor then release the foreign
	393	* "drm" data, otherwise unregisters the "drm" data, frees the dev list and
	394	* unregisters the character device.
	395	*/
84b1fd10	396	int drm_put_dev(struct drm_device * dev)
1da177e4 LT	397	{
	398	DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
	399
1da177e4 LT	400	if (dev->devname) {
	401	drm_free(dev->devname, strlen(dev->devname) + 1,
	402	DRM_MEM_DRIVER);
	403	dev->devname = NULL;
	404	}
	405	drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
	406	return 0;
	407	}
	408
	409	/**
	410	* Put a secondary minor number.
	411	*
	412	* \param sec_minor - structure to be released
	413	* \return always zero
	414	*
	415	* Cleans up the proc resources. Not legal for this to be the
	416	* last minor released.
	417	*
	418	*/
2c14f28b	419	int drm_put_minor(struct drm_minor **minor_p)
1da177e4	420	{
2c14f28b	421	struct drm_minor minor = minor_p;
673a394b	422
2c14f28b	423	DRM_DEBUG("release secondary minor %d\n", minor->index);
b5e89ed5	424
2c14f28b DA	425	if (minor->type == DRM_MINOR_LEGACY)
	426	drm_proc_cleanup(minor, drm_proc_root);
	427	drm_sysfs_device_remove(minor);
1da177e4	428
2c14f28b	429	idr_remove(&drm_minors_idr, minor->index);
b5e89ed5	430
2c14f28b DA	431	kfree(minor);
2c14f28b DA	432	*minor_p = NULL;
1da177e4 LT	433	return 0;
1da177e4 LT	434	}