drm/linux-core/drm_ioctl.c

/* drm_ioctl.h -- IOCTL processing for DRM -*- linux-c -*-
 * Created: Fri Jan  8 09:01:26 1999 by faith@valinux.com
 *
 * Copyright 1999 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.
 *
 * Authors:
 *    Rickard E. (Rik) Faith <faith@valinux.com>
 *    Gareth Hughes <gareth@valinux.com>
 */

#define __NO_VERSION__
#include "drmP.h"

int DRM(irq_busid)(struct inode *inode, struct file *filp,
		   unsigned int cmd, unsigned long arg)
{
	drm_irq_busid_t p;
	struct pci_dev	*dev;

	if (copy_from_user(&p, (drm_irq_busid_t *)arg, sizeof(p)))
		return -EFAULT;
	dev = pci_find_slot(p.busnum, PCI_DEVFN(p.devnum, p.funcnum));
	if (dev) p.irq = dev->irq;
	else	 p.irq = 0;
	DRM_DEBUG("%d:%d:%d => IRQ %d\n",
		  p.busnum, p.devnum, p.funcnum, p.irq);
	if (copy_to_user((drm_irq_busid_t *)arg, &p, sizeof(p)))
		return -EFAULT;
	return 0;
}

int DRM(getunique)(struct inode *inode, struct file *filp,
		   unsigned int cmd, unsigned long arg)
{
	drm_file_t	 *priv	 = filp->private_data;
	drm_device_t	 *dev	 = priv->dev;
	drm_unique_t	 u;

	if (copy_from_user(&u, (drm_unique_t *)arg, sizeof(u)))
		return -EFAULT;
	if (u.unique_len >= dev->unique_len) {
		if (copy_to_user(u.unique, dev->unique, dev->unique_len))
			return -EFAULT;
	}
	u.unique_len = dev->unique_len;
	if (copy_to_user((drm_unique_t *)arg, &u, sizeof(u)))
		return -EFAULT;
	return 0;
}

int DRM(setunique)(struct inode *inode, struct file *filp,
		   unsigned int cmd, unsigned long arg)
{
	drm_file_t	 *priv	 = filp->private_data;
	drm_device_t	 *dev	 = priv->dev;
	drm_unique_t	 u;

	if (dev->unique_len || dev->unique)
		return -EBUSY;

	if (copy_from_user(&u, (drm_unique_t *)arg, sizeof(u)))
		return -EFAULT;

	if (!u.unique_len)
		return -EINVAL;

	dev->unique_len = u.unique_len;
	dev->unique	= DRM(alloc)(u.unique_len + 1, DRM_MEM_DRIVER);
	if (copy_from_user(dev->unique, u.unique, dev->unique_len))
		return -EFAULT;
	dev->unique[dev->unique_len] = '\0';

	dev->devname = DRM(alloc)(strlen(dev->name) + strlen(dev->unique) + 2,
				  DRM_MEM_DRIVER);
	sprintf(dev->devname, "%s@%s", dev->name, dev->unique);

	return 0;
}


int DRM(getmap)( struct inode *inode, struct file *filp,
		 unsigned int cmd, unsigned long arg )
{
	drm_file_t   *priv = filp->private_data;
	drm_device_t *dev  = priv->dev;
	drm_map_t    map;
	int          idx;

	if (copy_from_user(&map, (drm_map_t *)arg, sizeof(map)))
		return -EFAULT;
	idx = map.offset;
	down(&dev->struct_sem);
	if (idx < 0 || idx >= dev->map_count) {
		up(&dev->struct_sem);
		return -EINVAL;
	}
	map.offset = dev->maplist[idx]->offset;
	map.size   = dev->maplist[idx]->size;
	map.type   = dev->maplist[idx]->type;
	map.flags  = dev->maplist[idx]->flags;
	map.handle = dev->maplist[idx]->handle;
	map.mtrr   = dev->maplist[idx]->mtrr;
	up(&dev->struct_sem);

	if (copy_to_user((drm_map_t *)arg, &map, sizeof(map))) return -EFAULT;
	return 0;
}

int DRM(getclient)( struct inode *inode, struct file *filp,
		    unsigned int cmd, unsigned long arg )
{
	drm_file_t   *priv = filp->private_data;
	drm_device_t *dev  = priv->dev;
	drm_client_t client;
	drm_file_t   *pt;
	int          idx;
	int          i;

	if (copy_from_user(&client, (drm_client_t *)arg, sizeof(client)))
		return -EFAULT;
	idx = client.idx;
	down(&dev->struct_sem);
	for (i = 0, pt = dev->file_first; i < idx && pt; i++, pt = pt->next)
		;

	if (!pt) {
		up(&dev->struct_sem);
		return -EINVAL;
	}
	client.auth  = pt->authenticated;
	client.pid   = pt->pid;
	client.uid   = pt->uid;
	client.magic = pt->magic;
	client.iocs  = pt->ioctl_count;
	up(&dev->struct_sem);

	if (copy_to_user((drm_client_t *)arg, &client, sizeof(client)))
		return -EFAULT;
	return 0;
}

int DRM(getstats)( struct inode *inode, struct file *filp,
		   unsigned int cmd, unsigned long arg )
{
	drm_file_t   *priv = filp->private_data;
	drm_device_t *dev  = priv->dev;
	drm_stats_t  stats;
	int          i;

	memset(&stats, 0, sizeof(stats));
	
	down(&dev->struct_sem);

	for (i = 0; i < dev->counters; i++) {
		if (dev->types[i] == _DRM_STAT_LOCK)
			stats.data[i].value
				= (dev->lock.hw_lock
				   ? dev->lock.hw_lock->lock : 0);
		else 
			stats.data[i].value = atomic_read(&dev->counts[i]);
		stats.data[i].type  = dev->types[i];
	}
	
	stats.count = dev->counters;

	up(&dev->struct_sem);

	if (copy_to_user((drm_stats_t *)arg, &stats, sizeof(stats)))
		return -EFAULT;
	return 0;
}