ioctl.c
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上传日期:2013-04-10
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文件大小:3k
- /* ioctl.c -- IOCTL processing for DRM -*- linux-c -*-
- * Created: Fri Jan 8 09:01:26 1999 by faith@precisioninsight.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
- * 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.
- *
- * Authors:
- * Rickard E. (Rik) Faith <faith@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 %dn",
- 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 || u.unique_len > 1024)
- 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] = ' ';
- 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;
- }