[mirror_ubuntu-artful-kernel.git] / drivers / char / 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_cards_limit = 16;	/* Enough for one machine */
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(cards_limit, "Maximum number of graphics cards");
MODULE_PARM_DESC(debug, "Enable debug output");

module_param_named(cards_limit, drm_cards_limit, int, 0444);
module_param_named(debug, drm_debug, int, 0600);

drm_head_t **drm_heads;
struct class *drm_class;
struct proc_dir_entry *drm_proc_root;

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

	INIT_LIST_HEAD(&dev->filelist);
	spin_lock_init(&dev->count_lock);
	spin_lock_init(&dev->drw_lock);
	spin_lock_init(&dev->tasklet_lock);
	spin_lock_init(&dev->lock.spinlock);
	init_timer(&dev->timer);
	mutex_init(&dev->struct_mutex);
	mutex_init(&dev->ctxlist_mutex);

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

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

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

	INIT_LIST_HEAD(&dev->maplist);

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

	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);
		}
	}

	retcode = drm_ctxbitmap_init(dev);
	if (retcode) {
		DRM_ERROR("Cannot allocate memory for context bitmap.\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_head(drm_device_t * dev, drm_head_t * head)
{
	drm_head_t **heads = drm_heads;
	int ret;
	int minor;

	DRM_DEBUG("\n");

	for (minor = 0; minor < drm_cards_limit; minor++, heads++) {
		if (!*heads) {

			*head = (drm_head_t) {
			.dev = dev,.device =
				    MKDEV(DRM_MAJOR, minor),.minor = minor,};

			if ((ret =
			     drm_proc_init(dev, minor, drm_proc_root,
					   &head->dev_root))) {
				printk(KERN_ERR
				       "DRM: Failed to initialize /proc/dri.\n");
				goto err_g1;
			}

			head->dev_class = drm_sysfs_device_add(drm_class, head);
			if (IS_ERR(head->dev_class)) {
				printk(KERN_ERR
				       "DRM: Error sysfs_device_add.\n");
				ret = PTR_ERR(head->dev_class);
				goto err_g2;
			}
			*heads = head;

			DRM_DEBUG("new minor assigned %d\n", minor);
			return 0;
		}
	}
	DRM_ERROR("out of minors\n");
	return -ENOMEM;
      err_g2:
	drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
      err_g1:
	*head = (drm_head_t) {
	.dev = 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)
{
	drm_device_t *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;

	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_head(dev, &dev->primary)))
		goto err_g2;
	
	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
		 driver->name, driver->major, driver->minor, driver->patchlevel,
		 driver->date, dev->primary.minor);

	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(drm_device_t * dev)
{
	DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);

	if (dev->unique) {
		drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
		dev->unique = NULL;
		dev->unique_len = 0;
	}
	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_head(drm_head_t * head)
{
	int minor = head->minor;

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

	drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
	drm_sysfs_device_remove(head->dev_class);

	*head = (drm_head_t) {.dev = NULL};

	drm_heads[minor] = 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
	39	unsigned int drm_cards_limit = 16; /* Enough for one machine */
b5e89ed5	40	unsigned int drm_debug = 0; /* 1 to enable debug output */
1da177e4 LT	41	EXPORT_SYMBOL(drm_debug);
1da177e4 LT	42
b5e89ed5 DA	43	MODULE_AUTHOR(CORE_AUTHOR);
b5e89ed5 DA	44	MODULE_DESCRIPTION(CORE_DESC);
1da177e4 LT	45	MODULE_LICENSE("GPL and additional rights");
	46	MODULE_PARM_DESC(cards_limit, "Maximum number of graphics cards");
	47	MODULE_PARM_DESC(debug, "Enable debug output");
	48
	49	module_param_named(cards_limit, drm_cards_limit, int, 0444);
c0758146	50	module_param_named(debug, drm_debug, int, 0600);
1da177e4 LT	51
1da177e4 LT	52	drm_head_t **drm_heads;
0650fd58	53	struct class *drm_class;
1da177e4 LT	54	struct proc_dir_entry *drm_proc_root;
1da177e4 LT	55
b5e89ed5 DA	56	static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
	57	const struct pci_device_id *ent,
	58	struct drm_driver *driver)
1da177e4 LT	59	{
	60	int retcode;
	61
bd1b331f	62	INIT_LIST_HEAD(&dev->filelist);
1da177e4	63	spin_lock_init(&dev->count_lock);
bea5679f	64	spin_lock_init(&dev->drw_lock);
8163e418	65	spin_lock_init(&dev->tasklet_lock);
040ac320	66	spin_lock_init(&dev->lock.spinlock);
b5e89ed5	67	init_timer(&dev->timer);
30e2fb18 DA	68	mutex_init(&dev->struct_mutex);
30e2fb18 DA	69	mutex_init(&dev->ctxlist_mutex);
1da177e4	70
b5e89ed5	71	dev->pdev = pdev;
2f02cc3f EA	72	dev->pci_device = pdev->device;
2f02cc3f EA	73	dev->pci_vendor = pdev->vendor;
1da177e4 LT	74
1da177e4 LT	75	#ifdef __alpha__
b5e89ed5	76	dev->hose = pdev->sysdata;
1da177e4	77	#endif
1da177e4 LT	78	dev->irq = pdev->irq;
1da177e4 LT	79
8d153f71	80	if (drm_ht_create(&dev->map_hash, 12)) {
8d153f71 TH	81	return -ENOMEM;
8d153f71 TH	82	}
836cf046	83
bd1b331f DA	84	INIT_LIST_HEAD(&dev->maplist);
bd1b331f DA	85
1da177e4 LT	86	/* the DRM has 6 basic counters */
1da177e4 LT	87	dev->counters = 6;
b5e89ed5 DA	88	dev->types[0] = _DRM_STAT_LOCK;
	89	dev->types[1] = _DRM_STAT_OPENS;
	90	dev->types[2] = _DRM_STAT_CLOSES;
	91	dev->types[3] = _DRM_STAT_IOCTLS;
	92	dev->types[4] = _DRM_STAT_LOCKS;
	93	dev->types[5] = _DRM_STAT_UNLOCKS;
1da177e4 LT	94
1da177e4 LT	95	dev->driver = driver;
b5e89ed5	96
22eae947 DA	97	if (dev->driver->load)
22eae947 DA	98	if ((retcode = dev->driver->load(dev, ent->driver_data)))
1da177e4 LT	99	goto error_out_unreg;
	100
	101	if (drm_core_has_AGP(dev)) {
cda17380 DA	102	if (drm_device_is_agp(dev))
cda17380 DA	103	dev->agp = drm_agp_init(dev);
b5e89ed5 DA	104	if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
	105	&& (dev->agp == NULL)) {
	106	DRM_ERROR("Cannot initialize the agpgart module.\n");
1da177e4 LT	107	retcode = -EINVAL;
	108	goto error_out_unreg;
	109	}
	110	if (drm_core_has_MTRR(dev)) {
	111	if (dev->agp)
b5e89ed5 DA	112	dev->agp->agp_mtrr =
	113	mtrr_add(dev->agp->agp_info.aper_base,
	114	dev->agp->agp_info.aper_size *
	115	1024 * 1024, MTRR_TYPE_WRCOMB, 1);
1da177e4 LT	116	}
	117	}
	118
b5e89ed5 DA	119	retcode = drm_ctxbitmap_init(dev);
	120	if (retcode) {
	121	DRM_ERROR("Cannot allocate memory for context bitmap.\n");
1da177e4 LT	122	goto error_out_unreg;
	123	}
	124
	125	return 0;
b5e89ed5 DA	126
b5e89ed5 DA	127	error_out_unreg:
22eae947	128	drm_lastclose(dev);
1da177e4 LT	129	return retcode;
	130	}
	131
1da177e4	132
1da177e4 LT	133	/**
	134	* Get a secondary minor number.
	135	*
	136	* \param dev device data structure
	137	* \param sec-minor structure to hold the assigned minor
	138	* \return negative number on failure.
	139	*
	140	* Search an empty entry and initialize it to the given parameters, and
	141	* create the proc init entry via proc_init(). This routines assigns
	142	* minor numbers to secondary heads of multi-headed cards
	143	*/
b5e89ed5	144	static int drm_get_head(drm_device_t * dev, drm_head_t * head)
1da177e4 LT	145	{
	146	drm_head_t **heads = drm_heads;
	147	int ret;
	148	int minor;
	149
	150	DRM_DEBUG("\n");
	151
	152	for (minor = 0; minor < drm_cards_limit; minor++, heads++) {
	153	if (!*heads) {
b5e89ed5	154
1da177e4	155	*head = (drm_head_t) {
b5e89ed5 DA	156	.dev = dev,.device =
	157	MKDEV(DRM_MAJOR, minor),.minor = minor,};
	158
	159	if ((ret =
	160	drm_proc_init(dev, minor, drm_proc_root,
	161	&head->dev_root))) {
	162	printk(KERN_ERR
	163	"DRM: Failed to initialize /proc/dri.\n");
1da177e4 LT	164	goto err_g1;
	165	}
	166
732052ed	167	head->dev_class = drm_sysfs_device_add(drm_class, head);
1da177e4	168	if (IS_ERR(head->dev_class)) {
b5e89ed5 DA	169	printk(KERN_ERR
b5e89ed5 DA	170	"DRM: Error sysfs_device_add.\n");
1da177e4 LT	171	ret = PTR_ERR(head->dev_class);
	172	goto err_g2;
	173	}
	174	*heads = head;
	175
	176	DRM_DEBUG("new minor assigned %d\n", minor);
	177	return 0;
	178	}
	179	}
	180	DRM_ERROR("out of minors\n");
	181	return -ENOMEM;
b5e89ed5	182	err_g2:
1da177e4	183	drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
b5e89ed5 DA	184	err_g1:
	185	*head = (drm_head_t) {
	186	.dev = NULL};
1da177e4 LT	187	return ret;
1da177e4 LT	188	}
b5e89ed5	189
c94f7029 DA	190	/**
	191	* Register.
	192	*
	193	* \param pdev - PCI device structure
	194	* \param ent entry from the PCI ID table with device type flags
	195	* \return zero on success or a negative number on failure.
	196	*
	197	* Attempt to gets inter module "drm" information. If we are first
	198	* then register the character device and inter module information.
	199	* Try and register, if we fail to register, backout previous work.
	200	*/
	201	int drm_get_dev(struct pci_dev pdev, const struct pci_device_id ent,
b5e89ed5	202	struct drm_driver *driver)
c94f7029 DA	203	{
	204	drm_device_t *dev;
	205	int ret;
	206
	207	DRM_DEBUG("\n");
	208
	209	dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
	210	if (!dev)
	211	return -ENOMEM;
	212
2c3f0edd JG	213	ret = pci_enable_device(pdev);
	214	if (ret)
	215	goto err_g1;
c94f7029 DA	216
	217	if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
	218	printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
2c3f0edd	219	goto err_g2;
c94f7029 DA	220	}
c94f7029 DA	221	if ((ret = drm_get_head(dev, &dev->primary)))
2c3f0edd	222	goto err_g2;
22eae947 DA	223
	224	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
	225	driver->name, driver->major, driver->minor, driver->patchlevel,
	226	driver->date, dev->primary.minor);
c94f7029 DA	227
	228	return 0;
	229
2c3f0edd JG	230	err_g2:
	231	pci_disable_device(pdev);
	232	err_g1:
c94f7029 DA	233	drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
	234	return ret;
	235	}
b5e89ed5	236
1da177e4 LT	237	/**
	238	* Put a device minor number.
	239	*
	240	* \param dev device data structure
	241	* \return always zero
	242	*
	243	* Cleans up the proc resources. If it is the last minor then release the foreign
	244	* "drm" data, otherwise unregisters the "drm" data, frees the dev list and
	245	* unregisters the character device.
	246	*/
	247	int drm_put_dev(drm_device_t * dev)
	248	{
	249	DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
	250
	251	if (dev->unique) {
	252	drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
	253	dev->unique = NULL;
	254	dev->unique_len = 0;
	255	}
	256	if (dev->devname) {
	257	drm_free(dev->devname, strlen(dev->devname) + 1,
	258	DRM_MEM_DRIVER);
	259	dev->devname = NULL;
	260	}
	261	drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
	262	return 0;
	263	}
	264
	265	/**
	266	* Put a secondary minor number.
	267	*
	268	* \param sec_minor - structure to be released
	269	* \return always zero
	270	*
	271	* Cleans up the proc resources. Not legal for this to be the
	272	* last minor released.
	273	*
	274	*/
b5e89ed5	275	int drm_put_head(drm_head_t * head)
1da177e4 LT	276	{
1da177e4 LT	277	int minor = head->minor;
b5e89ed5	278
1da177e4	279	DRM_DEBUG("release secondary minor %d\n", minor);
b5e89ed5	280
1da177e4	281	drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
732052ed	282	drm_sysfs_device_remove(head->dev_class);
b5e89ed5	283
732052ed	284	*head = (drm_head_t) {.dev = NULL};
1da177e4 LT	285
1da177e4 LT	286	drm_heads[minor] = NULL;
b5e89ed5	287
1da177e4 LT	288	return 0;
1da177e4 LT	289	}