[net-next-2.6.git] / drivers / char / drm / drm_drv.c

/**
 * \file drm_drv.c
 * Generic driver template
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 *
 * To use this template, you must at least define the following (samples
 * given for the MGA driver):
 *
 * \code
 * #define DRIVER_AUTHOR	"VA Linux Systems, Inc."
 *
 * #define DRIVER_NAME		"mga"
 * #define DRIVER_DESC		"Matrox G200/G400"
 * #define DRIVER_DATE		"20001127"
 *
 * #define drm_x		mga_##x
 * \endcode
 */

/*
 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
 *
 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 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
 * VA LINUX SYSTEMS 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 "drmP.h"
#include "drm_core.h"

static int drm_version(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);

/** Ioctl table */
static struct drm_ioctl_desc drm_ioctls[] = {
	DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
	DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
	DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
	DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0),
	DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
	DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
	DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY),

	DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),

	DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),

	DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),

	DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),

	DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),

	DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),

	DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),

	DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
	/* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
	DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH),

	DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),

#if __OS_HAS_AGP
	DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
#endif

	DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),

	DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, 0),

	DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
};

#define DRM_CORE_IOCTL_COUNT	ARRAY_SIZE( drm_ioctls )

/**
 * Take down the DRM device.
 *
 * \param dev DRM device structure.
 *
 * Frees every resource in \p dev.
 *
 * \sa drm_device
 */
int drm_lastclose(struct drm_device * dev)
{
	struct drm_magic_entry *pt, *next;
	struct drm_map_list *r_list, *list_t;
	struct drm_vma_entry *vma, *vma_temp;
	int i;

	DRM_DEBUG("\n");

	if (dev->driver->lastclose)
		dev->driver->lastclose(dev);
	DRM_DEBUG("driver lastclose completed\n");

	if (dev->unique) {
		drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
		dev->unique = NULL;
		dev->unique_len = 0;
	}

	if (dev->irq_enabled)
		drm_irq_uninstall(dev);

	mutex_lock(&dev->struct_mutex);

	/* Free drawable information memory */
	drm_drawable_free_all(dev);
	del_timer(&dev->timer);

	/* Clear pid list */
	if (dev->magicfree.next) {
		list_for_each_entry_safe(pt, next, &dev->magicfree, head) {
			list_del(&pt->head);
			drm_ht_remove_item(&dev->magiclist, &pt->hash_item);
			drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
		}
		drm_ht_remove(&dev->magiclist);
	}

	/* Clear AGP information */
	if (drm_core_has_AGP(dev) && dev->agp) {
		struct drm_agp_mem *entry, *tempe;

		/* Remove AGP resources, but leave dev->agp
		   intact until drv_cleanup is called. */
		list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) {
			if (entry->bound)
				drm_unbind_agp(entry->memory);
			drm_free_agp(entry->memory, entry->pages);
			drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
		}
		INIT_LIST_HEAD(&dev->agp->memory);

		if (dev->agp->acquired)
			drm_agp_release(dev);

		dev->agp->acquired = 0;
		dev->agp->enabled = 0;
	}
	if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) {
		drm_sg_cleanup(dev->sg);
		dev->sg = NULL;
	}

	/* Clear vma list (only built for debugging) */
	list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) {
		list_del(&vma->head);
		drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
	}

	list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) {
		drm_rmmap_locked(dev, r_list->map);
		r_list = NULL;
	}

	if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) {
		for (i = 0; i < dev->queue_count; i++) {
			if (dev->queuelist[i]) {
				drm_free(dev->queuelist[i],
					 sizeof(*dev->queuelist[0]),
					 DRM_MEM_QUEUES);
				dev->queuelist[i] = NULL;
			}
		}
		drm_free(dev->queuelist,
			 dev->queue_slots * sizeof(*dev->queuelist),
			 DRM_MEM_QUEUES);
		dev->queuelist = NULL;
	}
	dev->queue_count = 0;

	if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
		drm_dma_takedown(dev);

	if (dev->lock.hw_lock) {
		dev->sigdata.lock = dev->lock.hw_lock = NULL;	/* SHM removed */
		dev->lock.file_priv = NULL;
		wake_up_interruptible(&dev->lock.lock_queue);
	}
	mutex_unlock(&dev->struct_mutex);

	DRM_DEBUG("lastclose completed\n");
	return 0;
}

/**
 * Module initialization. Called via init_module at module load time, or via
 * linux/init/main.c (this is not currently supported).
 *
 * \return zero on success or a negative number on failure.
 *
 * Initializes an array of drm_device structures, and attempts to
 * initialize all available devices, using consecutive minors, registering the
 * stubs and initializing the AGP device.
 *
 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
 * after the initialization for driver customization.
 */
int drm_init(struct drm_driver *driver)
{
	struct pci_dev *pdev = NULL;
	struct pci_device_id *pid;
	int i;

	DRM_DEBUG("\n");

	drm_mem_init();

	for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) {
		pid = (struct pci_device_id *)&driver->pci_driver.id_table[i];

		pdev = NULL;
		/* pass back in pdev to account for multiple identical cards */
		while ((pdev =
			pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
				       pid->subdevice, pdev)) != NULL) {
			/* stealth mode requires a manual probe */
			pci_dev_get(pdev);
			drm_get_dev(pdev, pid, driver);
		}
	}
	return 0;
}

EXPORT_SYMBOL(drm_init);

/**
 * Called via cleanup_module() at module unload time.
 *
 * Cleans up all DRM device, calling drm_lastclose().
 *
 * \sa drm_init
 */
static void drm_cleanup(struct drm_device * dev)
{
	DRM_DEBUG("\n");

	if (!dev) {
		DRM_ERROR("cleanup called no dev\n");
		return;
	}

	drm_lastclose(dev);

	drm_ht_remove(&dev->map_hash);

	drm_ctxbitmap_cleanup(dev);

	if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
	    dev->agp && dev->agp->agp_mtrr >= 0) {
		int retval;
		retval = mtrr_del(dev->agp->agp_mtrr,
				  dev->agp->agp_info.aper_base,
				  dev->agp->agp_info.aper_size * 1024 * 1024);
		DRM_DEBUG("mtrr_del=%d\n", retval);
	}

	if (drm_core_has_AGP(dev) && dev->agp) {
		drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS);
		dev->agp = NULL;
	}

	if (dev->driver->unload)
		dev->driver->unload(dev);

	drm_put_head(&dev->primary);
	if (drm_put_dev(dev))
		DRM_ERROR("Cannot unload module\n");
}

void drm_exit(struct drm_driver *driver)
{
	int i;
	struct drm_device *dev = NULL;
	struct drm_head *head;

	DRM_DEBUG("\n");

	for (i = 0; i < drm_cards_limit; i++) {
		head = drm_heads[i];
		if (!head)
			continue;
		if (!head->dev)
			continue;
		if (head->dev->driver != driver)
			continue;
		dev = head->dev;
		if (dev) {
			/* release the pci driver */
			if (dev->pdev)
				pci_dev_put(dev->pdev);
			drm_cleanup(dev);
		}
	}
	DRM_INFO("Module unloaded\n");
}

EXPORT_SYMBOL(drm_exit);

/** File operations structure */
static const struct file_operations drm_stub_fops = {
	.owner = THIS_MODULE,
	.open = drm_stub_open
};

static int __init drm_core_init(void)
{
	int ret = -ENOMEM;

	drm_cards_limit =
	    (drm_cards_limit <
	     DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1);
	drm_heads =
	    drm_calloc(drm_cards_limit, sizeof(*drm_heads), DRM_MEM_STUB);
	if (!drm_heads)
		goto err_p1;

	if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
		goto err_p1;

	drm_class = drm_sysfs_create(THIS_MODULE, "drm");
	if (IS_ERR(drm_class)) {
		printk(KERN_ERR "DRM: Error creating drm class.\n");
		ret = PTR_ERR(drm_class);
		goto err_p2;
	}

	drm_proc_root = proc_mkdir("dri", NULL);
	if (!drm_proc_root) {
		DRM_ERROR("Cannot create /proc/dri\n");
		ret = -1;
		goto err_p3;
	}

	DRM_INFO("Initialized %s %d.%d.%d %s\n",
		 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
	return 0;
      err_p3:
	drm_sysfs_destroy(drm_class);
      err_p2:
	unregister_chrdev(DRM_MAJOR, "drm");
	drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB);
      err_p1:
	return ret;
}

static void __exit drm_core_exit(void)
{
	remove_proc_entry("dri", NULL);
	drm_sysfs_destroy(drm_class);

	unregister_chrdev(DRM_MAJOR, "drm");

	drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB);
}

module_init(drm_core_init);
module_exit(drm_core_exit);

/**
 * Get version information
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg user argument, pointing to a drm_version structure.
 * \return zero on success or negative number on failure.
 *
 * Fills in the version information in \p arg.
 */
static int drm_version(struct drm_device *dev, void *data,
		       struct drm_file *file_priv)
{
	struct drm_version *version = data;
	int len;

	version->version_major = dev->driver->major;
	version->version_minor = dev->driver->minor;
	version->version_patchlevel = dev->driver->patchlevel;
	DRM_COPY(version->name, dev->driver->name);
	DRM_COPY(version->date, dev->driver->date);
	DRM_COPY(version->desc, dev->driver->desc);

	return 0;
}

/**
 * Called whenever a process performs an ioctl on /dev/drm.
 *
 * \param inode device inode.
 * \param file_priv DRM file private.
 * \param cmd command.
 * \param arg user argument.
 * \return zero on success or negative number on failure.
 *
 * Looks up the ioctl function in the ::ioctls table, checking for root
 * previleges if so required, and dispatches to the respective function.
 */
int drm_ioctl(struct inode *inode, struct file *filp,
	      unsigned int cmd, unsigned long arg)
{
	struct drm_file *file_priv = filp->private_data;
	struct drm_device *dev = file_priv->head->dev;
	struct drm_ioctl_desc *ioctl;
	drm_ioctl_t *func;
	unsigned int nr = DRM_IOCTL_NR(cmd);
	int retcode = -EINVAL;
	char *kdata = NULL;

	atomic_inc(&dev->ioctl_count);
	atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
	++file_priv->ioctl_count;

	DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
		  task_pid_nr(current), cmd, nr,
		  (long)old_encode_dev(file_priv->head->device),
		  file_priv->authenticated);

	if ((nr >= DRM_CORE_IOCTL_COUNT) &&
	    ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
		goto err_i1;
	if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
	    (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls))
		ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
	else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE))
		ioctl = &drm_ioctls[nr];
	else
		goto err_i1;

	func = ioctl->func;
	/* is there a local override? */
	if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
		func = dev->driver->dma_ioctl;


	if (!func) {
		DRM_DEBUG("no function\n");
		retcode = -EINVAL;
	} else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) ||
		   ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
		   ((ioctl->flags & DRM_MASTER) && !file_priv->master)) {
		retcode = -EACCES;
	} else {
		if (cmd & (IOC_IN | IOC_OUT)) {
			kdata = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
			if (!kdata)
				return -ENOMEM;
		}

		if (cmd & IOC_IN) {
			if (copy_from_user(kdata, (void __user *)arg,
					   _IOC_SIZE(cmd)) != 0) {
				retcode = -EACCES;
				goto err_i1;
			}
		}
		retcode = func(dev, kdata, file_priv);

		if (cmd & IOC_OUT) {
			if (copy_to_user((void __user *)arg, kdata,
					 _IOC_SIZE(cmd)) != 0)
				retcode = -EACCES;
		}
	}

      err_i1:
	if (kdata)
		kfree(kdata);
	atomic_dec(&dev->ioctl_count);
	if (retcode)
		DRM_DEBUG("ret = %x\n", retcode);
	return retcode;
}

EXPORT_SYMBOL(drm_ioctl);

drm_local_map_t *drm_getsarea(struct drm_device *dev)
{
	struct drm_map_list *entry;

	list_for_each_entry(entry, &dev->maplist, head) {
		if (entry->map && entry->map->type == _DRM_SHM &&
		    (entry->map->flags & _DRM_CONTAINS_LOCK)) {
			return entry->map;
		}
	}
	return NULL;
}
EXPORT_SYMBOL(drm_getsarea);
Commit	Line	Data
1da177e4	1	/**
b5e89ed5	2	* \file drm_drv.c
1da177e4 LT	3	* Generic driver template
	4	*
	5	* \author Rickard E. (Rik) Faith <faith@valinux.com>
	6	* \author Gareth Hughes <gareth@valinux.com>
	7	*
	8	* To use this template, you must at least define the following (samples
	9	* given for the MGA driver):
	10	*
	11	* \code
	12	* #define DRIVER_AUTHOR "VA Linux Systems, Inc."
	13	*
	14	* #define DRIVER_NAME "mga"
	15	* #define DRIVER_DESC "Matrox G200/G400"
	16	* #define DRIVER_DATE "20001127"
	17	*
1da177e4 LT	18	* #define drm_x mga_##x
	19	* \endcode
	20	*/
	21
	22	/*
	23	* Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
	24	*
	25	* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
	26	* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
	27	* All Rights Reserved.
	28	*
	29	* Permission is hereby granted, free of charge, to any person obtaining a
	30	* copy of this software and associated documentation files (the "Software"),
	31	* to deal in the Software without restriction, including without limitation
	32	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	33	* and/or sell copies of the Software, and to permit persons to whom the
	34	* Software is furnished to do so, subject to the following conditions:
	35	*
	36	* The above copyright notice and this permission notice (including the next
	37	* paragraph) shall be included in all copies or substantial portions of the
	38	* Software.
	39	*
	40	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	41	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	42	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	43	* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
	44	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	45	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	46	* OTHER DEALINGS IN THE SOFTWARE.
	47	*/
	48
	49	#include "drmP.h"
	50	#include "drm_core.h"
	51
c153f45f EA	52	static int drm_version(struct drm_device dev, void data,
c153f45f EA	53	struct drm_file *file_priv);
c94f7029	54
1da177e4	55	/** Ioctl table */
c153f45f EA	56	static struct drm_ioctl_desc drm_ioctls[] = {
	57	DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
	58	DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
	59	DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
	60	DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER\|DRM_ROOT_ONLY),
	61	DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0),
	62	DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
	63	DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
	64	DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER\|DRM_ROOT_ONLY),
	65
	66	DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	67	DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	68	DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	69	DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	70
	71	DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	72	DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
	73
	74	DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	75	DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
	76
	77	DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH\|DRM_ROOT_ONLY),
	78	DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	79	DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	80	DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
	81	DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	82	DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	83	DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
	84
	85	DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	86	DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	87
	88	DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
	89	DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
	90
	91	DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
	92
	93	DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	94	DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	95	DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
	96	DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
	97	DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
1da177e4	98	/* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
c153f45f	99	DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH),
1da177e4	100
c153f45f	101	DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
1da177e4 LT	102
1da177e4 LT	103	#if __OS_HAS_AGP
c153f45f EA	104	DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	105	DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	106	DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	107	DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
	108	DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	109	DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	110	DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	111	DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
1da177e4 LT	112	#endif
1da177e4 LT	113
c153f45f EA	114	DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
c153f45f EA	115	DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
1da177e4	116
c153f45f	117	DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, 0),
bea5679f	118
c153f45f	119	DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_drawable_info, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
1da177e4 LT	120	};
1da177e4 LT	121
0515b93c	122	#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
1da177e4 LT	123
	124	/**
	125	* Take down the DRM device.
	126	*
	127	* \param dev DRM device structure.
	128	*
	129	* Frees every resource in \p dev.
	130	*
aff138ab	131	* \sa drm_device
1da177e4	132	*/
84b1fd10	133	int drm_lastclose(struct drm_device * dev)
1da177e4	134	{
8fc2fdf4	135	struct drm_magic_entry pt, next;
55910517	136	struct drm_map_list r_list, list_t;
8fc2fdf4	137	struct drm_vma_entry vma, vma_temp;
1da177e4 LT	138	int i;
1da177e4 LT	139
b5e89ed5	140	DRM_DEBUG("\n");
1da177e4	141
22eae947 DA	142	if (dev->driver->lastclose)
	143	dev->driver->lastclose(dev);
	144	DRM_DEBUG("driver lastclose completed\n");
1da177e4 LT	145
	146	if (dev->unique) {
	147	drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
	148	dev->unique = NULL;
	149	dev->unique_len = 0;
	150	}
	151
b5e89ed5 DA	152	if (dev->irq_enabled)
b5e89ed5 DA	153	drm_irq_uninstall(dev);
1da177e4	154
30e2fb18	155	mutex_lock(&dev->struct_mutex);
d4e2cbe9 DA	156
	157	/* Free drawable information memory */
	158	drm_drawable_free_all(dev);
b5e89ed5	159	del_timer(&dev->timer);
1da177e4	160
b5e89ed5	161	/* Clear pid list */
0a0c721d TH	162	if (dev->magicfree.next) {
	163	list_for_each_entry_safe(pt, next, &dev->magicfree, head) {
	164	list_del(&pt->head);
	165	drm_ht_remove_item(&dev->magiclist, &pt->hash_item);
	166	drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
	167	}
1f4eccfd	168	drm_ht_remove(&dev->magiclist);
1da177e4 LT	169	}
1da177e4 LT	170
b5e89ed5	171	/* Clear AGP information */
1da177e4	172	if (drm_core_has_AGP(dev) && dev->agp) {
55910517	173	struct drm_agp_mem entry, tempe;
1da177e4	174
b5e89ed5 DA	175	/* Remove AGP resources, but leave dev->agp
b5e89ed5 DA	176	intact until drv_cleanup is called. */
bd1b331f	177	list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) {
b5e89ed5 DA	178	if (entry->bound)
	179	drm_unbind_agp(entry->memory);
	180	drm_free_agp(entry->memory, entry->pages);
	181	drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
1da177e4	182	}
bd1b331f	183	INIT_LIST_HEAD(&dev->agp->memory);
1da177e4	184
7ab98401	185	if (dev->agp->acquired)
b5e89ed5	186	drm_agp_release(dev);
1da177e4 LT	187
1da177e4 LT	188	dev->agp->acquired = 0;
b5e89ed5	189	dev->agp->enabled = 0;
1da177e4	190	}
836cf046 DA	191	if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) {
	192	drm_sg_cleanup(dev->sg);
	193	dev->sg = NULL;
	194	}
1da177e4	195
b5e89ed5	196	/* Clear vma list (only built for debugging) */
bd1b331f DA	197	list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) {
	198	list_del(&vma->head);
	199	drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
1da177e4 LT	200	}
1da177e4 LT	201
bd1b331f DA	202	list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) {
	203	drm_rmmap_locked(dev, r_list->map);
	204	r_list = NULL;
b5e89ed5 DA	205	}
	206
	207	if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) {
	208	for (i = 0; i < dev->queue_count; i++) {
	209	if (dev->queuelist[i]) {
	210	drm_free(dev->queuelist[i],
	211	sizeof(*dev->queuelist[0]),
	212	DRM_MEM_QUEUES);
1da177e4 LT	213	dev->queuelist[i] = NULL;
	214	}
	215	}
b5e89ed5 DA	216	drm_free(dev->queuelist,
	217	dev->queue_slots * sizeof(*dev->queuelist),
	218	DRM_MEM_QUEUES);
1da177e4 LT	219	dev->queuelist = NULL;
	220	}
	221	dev->queue_count = 0;
	222
	223	if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
b5e89ed5	224	drm_dma_takedown(dev);
1da177e4	225
b5e89ed5 DA	226	if (dev->lock.hw_lock) {
b5e89ed5 DA	227	dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */
6c340eac	228	dev->lock.file_priv = NULL;
b5e89ed5	229	wake_up_interruptible(&dev->lock.lock_queue);
1da177e4	230	}
30e2fb18	231	mutex_unlock(&dev->struct_mutex);
1da177e4	232
22eae947	233	DRM_DEBUG("lastclose completed\n");
1da177e4 LT	234	return 0;
	235	}
	236
1da177e4 LT	237	/**
	238	* Module initialization. Called via init_module at module load time, or via
	239	* linux/init/main.c (this is not currently supported).
	240	*
	241	* \return zero on success or a negative number on failure.
	242	*
	243	* Initializes an array of drm_device structures, and attempts to
	244	* initialize all available devices, using consecutive minors, registering the
	245	* stubs and initializing the AGP device.
b5e89ed5	246	*
1da177e4 LT	247	* Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
	248	* after the initialization for driver customization.
	249	*/
b5e89ed5	250	int drm_init(struct drm_driver *driver)
1da177e4 LT	251	{
	252	struct pci_dev *pdev = NULL;
	253	struct pci_device_id *pid;
	254	int i;
	255
b5e89ed5	256	DRM_DEBUG("\n");
1da177e4 LT	257
	258	drm_mem_init();
	259
b5e89ed5	260	for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) {
1da177e4	261	pid = (struct pci_device_id *)&driver->pci_driver.id_table[i];
b5e89ed5 DA	262
	263	pdev = NULL;
	264	/* pass back in pdev to account for multiple identical cards */
	265	while ((pdev =
	266	pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
	267	pid->subdevice, pdev)) != NULL) {
1da177e4 LT	268	/* stealth mode requires a manual probe */
	269	pci_dev_get(pdev);
	270	drm_get_dev(pdev, pid, driver);
	271	}
	272	}
	273	return 0;
	274	}
b5e89ed5	275
1da177e4 LT	276	EXPORT_SYMBOL(drm_init);
	277
	278	/**
	279	* Called via cleanup_module() at module unload time.
	280	*
22eae947	281	* Cleans up all DRM device, calling drm_lastclose().
b5e89ed5	282	*
aff138ab	283	* \sa drm_init
1da177e4	284	*/
84b1fd10	285	static void drm_cleanup(struct drm_device * dev)
1da177e4	286	{
b5e89ed5	287	DRM_DEBUG("\n");
1da177e4 LT	288
	289	if (!dev) {
	290	DRM_ERROR("cleanup called no dev\n");
	291	return;
	292	}
	293
22eae947	294	drm_lastclose(dev);
1da177e4	295
bd1b331f	296	drm_ht_remove(&dev->map_hash);
836cf046	297
b5e89ed5 DA	298	drm_ctxbitmap_cleanup(dev);
b5e89ed5 DA	299
1da177e4 LT	300	if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
	301	dev->agp && dev->agp->agp_mtrr >= 0) {
	302	int retval;
b5e89ed5 DA	303	retval = mtrr_del(dev->agp->agp_mtrr,
	304	dev->agp->agp_info.aper_base,
	305	dev->agp->agp_info.aper_size * 1024 * 1024);
	306	DRM_DEBUG("mtrr_del=%d\n", retval);
1da177e4	307	}
b5e89ed5 DA	308
	309	if (drm_core_has_AGP(dev) && dev->agp) {
	310	drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS);
1da177e4 LT	311	dev->agp = NULL;
	312	}
	313
22eae947 DA	314	if (dev->driver->unload)
22eae947 DA	315	dev->driver->unload(dev);
b5e89ed5	316
1da177e4	317	drm_put_head(&dev->primary);
b5e89ed5 DA	318	if (drm_put_dev(dev))
b5e89ed5 DA	319	DRM_ERROR("Cannot unload module\n");
1da177e4 LT	320	}
1da177e4 LT	321
b5e89ed5	322	void drm_exit(struct drm_driver *driver)
1da177e4 LT	323	{
1da177e4 LT	324	int i;
84b1fd10 DA	325	struct drm_device *dev = NULL;
84b1fd10 DA	326	struct drm_head *head;
b5e89ed5 DA	327
b5e89ed5 DA	328	DRM_DEBUG("\n");
1da177e4 LT	329
	330	for (i = 0; i < drm_cards_limit; i++) {
	331	head = drm_heads[i];
	332	if (!head)
	333	continue;
	334	if (!head->dev)
	335	continue;
b5e89ed5	336	if (head->dev->driver != driver)
1da177e4	337	continue;
b5e89ed5	338	dev = head->dev;
aab8df14 DA	339	if (dev) {
	340	/* release the pci driver */
	341	if (dev->pdev)
	342	pci_dev_put(dev->pdev);
	343	drm_cleanup(dev);
	344	}
1da177e4	345	}
b5e89ed5	346	DRM_INFO("Module unloaded\n");
1da177e4	347	}
b5e89ed5	348
1da177e4 LT	349	EXPORT_SYMBOL(drm_exit);
	350
	351	/** File operations structure */
2b8693c0	352	static const struct file_operations drm_stub_fops = {
1da177e4	353	.owner = THIS_MODULE,
b5e89ed5	354	.open = drm_stub_open
1da177e4 LT	355	};
	356
	357	static int __init drm_core_init(void)
	358	{
	359	int ret = -ENOMEM;
b5e89ed5 DA	360
	361	drm_cards_limit =
	362	(drm_cards_limit <
	363	DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1);
	364	drm_heads =
	365	drm_calloc(drm_cards_limit, sizeof(*drm_heads), DRM_MEM_STUB);
	366	if (!drm_heads)
1da177e4	367	goto err_p1;
b5e89ed5	368
1da177e4 LT	369	if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
1da177e4 LT	370	goto err_p1;
b5e89ed5	371
1da177e4 LT	372	drm_class = drm_sysfs_create(THIS_MODULE, "drm");
1da177e4 LT	373	if (IS_ERR(drm_class)) {
b5e89ed5	374	printk(KERN_ERR "DRM: Error creating drm class.\n");
1da177e4 LT	375	ret = PTR_ERR(drm_class);
	376	goto err_p2;
	377	}
	378
66600221	379	drm_proc_root = proc_mkdir("dri", NULL);
1da177e4 LT	380	if (!drm_proc_root) {
	381	DRM_ERROR("Cannot create /proc/dri\n");
	382	ret = -1;
	383	goto err_p3;
	384	}
b5e89ed5 DA	385
	386	DRM_INFO("Initialized %s %d.%d.%d %s\n",
	387	CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
1da177e4	388	return 0;
b5e89ed5	389	err_p3:
1da177e4	390	drm_sysfs_destroy(drm_class);
b5e89ed5	391	err_p2:
1da177e4 LT	392	unregister_chrdev(DRM_MAJOR, "drm");
1da177e4 LT	393	drm_free(drm_heads, sizeof(drm_heads) drm_cards_limit, DRM_MEM_STUB);
b5e89ed5	394	err_p1:
1da177e4 LT	395	return ret;
	396	}
	397
b5e89ed5	398	static void __exit drm_core_exit(void)
1da177e4 LT	399	{
	400	remove_proc_entry("dri", NULL);
	401	drm_sysfs_destroy(drm_class);
	402
	403	unregister_chrdev(DRM_MAJOR, "drm");
	404
b5e89ed5	405	drm_free(drm_heads, sizeof(drm_heads) drm_cards_limit, DRM_MEM_STUB);
1da177e4 LT	406	}
1da177e4 LT	407
b5e89ed5 DA	408	module_init(drm_core_init);
b5e89ed5 DA	409	module_exit(drm_core_exit);
1da177e4 LT	410
	411	/**
	412	* Get version information
	413	*
	414	* \param inode device inode.
	415	* \param filp file pointer.
	416	* \param cmd command.
	417	* \param arg user argument, pointing to a drm_version structure.
	418	* \return zero on success or negative number on failure.
	419	*
	420	* Fills in the version information in \p arg.
	421	*/
c153f45f EA	422	static int drm_version(struct drm_device dev, void data,
c153f45f EA	423	struct drm_file *file_priv)
1da177e4	424	{
c153f45f	425	struct drm_version *version = data;
22eae947	426	int len;
1da177e4	427
c153f45f EA	428	version->version_major = dev->driver->major;
	429	version->version_minor = dev->driver->minor;
	430	version->version_patchlevel = dev->driver->patchlevel;
	431	DRM_COPY(version->name, dev->driver->name);
	432	DRM_COPY(version->date, dev->driver->date);
	433	DRM_COPY(version->desc, dev->driver->desc);
b5e89ed5	434
1da177e4 LT	435	return 0;
	436	}
	437
b5e89ed5	438	/**
1da177e4 LT	439	* Called whenever a process performs an ioctl on /dev/drm.
	440	*
	441	* \param inode device inode.
6c340eac	442	* \param file_priv DRM file private.
1da177e4 LT	443	* \param cmd command.
	444	* \param arg user argument.
	445	* \return zero on success or negative number on failure.
	446	*
	447	* Looks up the ioctl function in the ::ioctls table, checking for root
	448	* previleges if so required, and dispatches to the respective function.
	449	*/
b5e89ed5 DA	450	int drm_ioctl(struct inode inode, struct file filp,
b5e89ed5 DA	451	unsigned int cmd, unsigned long arg)
1da177e4	452	{
6c340eac EA	453	struct drm_file *file_priv = filp->private_data;
6c340eac EA	454	struct drm_device *dev = file_priv->head->dev;
c153f45f	455	struct drm_ioctl_desc *ioctl;
1da177e4 LT	456	drm_ioctl_t *func;
	457	unsigned int nr = DRM_IOCTL_NR(cmd);
	458	int retcode = -EINVAL;
c153f45f	459	char *kdata = NULL;
1da177e4	460
b5e89ed5 DA	461	atomic_inc(&dev->ioctl_count);
b5e89ed5 DA	462	atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
6c340eac	463	++file_priv->ioctl_count;
1da177e4	464
b5e89ed5	465	DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
ba25f9dc	466	task_pid_nr(current), cmd, nr,
6c340eac EA	467	(long)old_encode_dev(file_priv->head->device),
6c340eac EA	468	file_priv->authenticated);
b5e89ed5	469
0515b93c	470	if ((nr >= DRM_CORE_IOCTL_COUNT) &&
99da6d86 TH	471	((nr < DRM_COMMAND_BASE) \|\| (nr >= DRM_COMMAND_END)))
99da6d86 TH	472	goto err_i1;
0515b93c DA	473	if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
0515b93c DA	474	(nr < DRM_COMMAND_BASE + dev->driver->num_ioctls))
1da177e4	475	ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
99da6d86 TH	476	else if ((nr >= DRM_COMMAND_END) \|\| (nr < DRM_COMMAND_BASE))
99da6d86 TH	477	ioctl = &drm_ioctls[nr];
1da177e4 LT	478	else
1da177e4 LT	479	goto err_i1;
b5e89ed5	480
1da177e4 LT	481	func = ioctl->func;
	482	/* is there a local override? */
	483	if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
	484	func = dev->driver->dma_ioctl;
b5e89ed5	485
c153f45f	486
b5e89ed5 DA	487	if (!func) {
b5e89ed5 DA	488	DRM_DEBUG("no function\n");
1da177e4	489	retcode = -EINVAL;
a7a2cc31	490	} else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) \|\|
6c340eac EA	491	((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) \|\|
6c340eac EA	492	((ioctl->flags & DRM_MASTER) && !file_priv->master)) {
1da177e4 LT	493	retcode = -EACCES;
1da177e4 LT	494	} else {
c153f45f EA	495	if (cmd & (IOC_IN \| IOC_OUT)) {
	496	kdata = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
	497	if (!kdata)
	498	return -ENOMEM;
	499	}
	500
	501	if (cmd & IOC_IN) {
	502	if (copy_from_user(kdata, (void __user *)arg,
	503	_IOC_SIZE(cmd)) != 0) {
	504	retcode = -EACCES;
	505	goto err_i1;
	506	}
	507	}
	508	retcode = func(dev, kdata, file_priv);
	509
	510	if (cmd & IOC_OUT) {
	511	if (copy_to_user((void __user *)arg, kdata,
	512	_IOC_SIZE(cmd)) != 0)
	513	retcode = -EACCES;
	514	}
1da177e4	515	}
b5e89ed5 DA	516
b5e89ed5 DA	517	err_i1:
c153f45f EA	518	if (kdata)
c153f45f EA	519	kfree(kdata);
b5e89ed5 DA	520	atomic_dec(&dev->ioctl_count);
	521	if (retcode)
	522	DRM_DEBUG("ret = %x\n", retcode);
1da177e4 LT	523	return retcode;
1da177e4 LT	524	}
1da177e4	525
b5e89ed5	526	EXPORT_SYMBOL(drm_ioctl);
da509d7a DA	527
	528	drm_local_map_t drm_getsarea(struct drm_device dev)
	529	{
55910517	530	struct drm_map_list *entry;
da509d7a	531
6f710105	532	list_for_each_entry(entry, &dev->maplist, head) {
da509d7a DA	533	if (entry->map && entry->map->type == _DRM_SHM &&
	534	(entry->map->flags & _DRM_CONTAINS_LOCK)) {
	535	return entry->map;
	536	}
	537	}
	538	return NULL;
	539	}
	540	EXPORT_SYMBOL(drm_getsarea);