patch-2.4.8 linux/drivers/char/drm/fops.c

• Lines: 254
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.7/linux/drivers/char/drm/fops.c
• Orig date: Tue May 22 10:23:16 2001

diff -u --recursive --new-file v2.4.7/linux/drivers/char/drm/fops.c linux/drivers/char/drm/fops.c
@@ -1,253 +0,0 @@
-/* fops.c -- File operations for DRM -*- linux-c -*-
- * Created: Mon Jan  4 08:58:31 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>
- *    Daryll Strauss <daryll@valinux.com>
- *
- */
-
-#define __NO_VERSION__
-#include "drmP.h"
-#include <linux/poll.h>
-
-/* drm_open is called whenever a process opens /dev/drm. */
-
-int drm_open_helper(struct inode *inode, struct file *filp, drm_device_t *dev)
-{
-	kdev_t	     minor = MINOR(inode->i_rdev);
-	drm_file_t   *priv;
-
-	if (filp->f_flags & O_EXCL)   return -EBUSY; /* No exclusive opens */
-	if (!drm_cpu_valid())         return -EINVAL;
-
-	DRM_DEBUG("pid = %d, minor = %d\n", current->pid, minor);
-
-	priv		    = drm_alloc(sizeof(*priv), DRM_MEM_FILES);
-	if(priv == NULL)
-		return -ENOMEM;
-	memset(priv, 0, sizeof(*priv));
-
-	filp->private_data  = priv;
-	priv->uid	    = current->euid;
-	priv->pid	    = current->pid;
-	priv->minor	    = minor;
-	priv->dev	    = dev;
-	priv->ioctl_count   = 0;
-	priv->authenticated = capable(CAP_SYS_ADMIN);
-
-	down(&dev->struct_sem);
-	if (!dev->file_last) {
-		priv->next	= NULL;
-		priv->prev	= NULL;
-		dev->file_first = priv;
-		dev->file_last	= priv;
-	} else {
-		priv->next	     = NULL;
-		priv->prev	     = dev->file_last;
-		dev->file_last->next = priv;
-		dev->file_last	     = priv;
-	}
-	up(&dev->struct_sem);
-	
-	return 0;
-}
-
-int drm_flush(struct file *filp)
-{
-	drm_file_t    *priv   = filp->private_data;
-	drm_device_t  *dev    = priv->dev;
-
-	DRM_DEBUG("pid = %d, device = 0x%x, open_count = %d\n",
-		  current->pid, dev->device, dev->open_count);
-	return 0;
-}
-
-/* drm_release is called whenever a process closes /dev/drm*.  Linux calls
-   this only if any mappings have been closed. */
-
-int drm_release(struct inode *inode, struct file *filp)
-{
-	drm_file_t    *priv   = filp->private_data;
-	drm_device_t  *dev    = priv->dev;
-
-	DRM_DEBUG("pid = %d, device = 0x%x, open_count = %d\n",
-		  current->pid, dev->device, dev->open_count);
-
-	if (dev->lock.hw_lock
-	    && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
-	    && dev->lock.pid == current->pid) {
-		DRM_ERROR("Process %d dead, freeing lock for context %d\n",
-			  current->pid,
-			  _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
-		drm_lock_free(dev,
-			      &dev->lock.hw_lock->lock,
-			      _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
-		
-				/* FIXME: may require heavy-handed reset of
-                                   hardware at this point, possibly
-                                   processed via a callback to the X
-                                   server. */
-	}
-	drm_reclaim_buffers(dev, priv->pid);
-
-	drm_fasync(-1, filp, 0);
-
-	down(&dev->struct_sem);
-	if (priv->prev) priv->prev->next = priv->next;
-	else		dev->file_first	 = priv->next;
-	if (priv->next) priv->next->prev = priv->prev;
-	else		dev->file_last	 = priv->prev;
-	up(&dev->struct_sem);
-	
-	drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
-	
-	return 0;
-}
-
-int drm_fasync(int fd, struct file *filp, int on)
-{
-	drm_file_t    *priv   = filp->private_data;
-	drm_device_t  *dev    = priv->dev;
-	int	      retcode;
-	
-	DRM_DEBUG("fd = %d, device = 0x%x\n", fd, dev->device);
-	retcode = fasync_helper(fd, filp, on, &dev->buf_async);
-	if (retcode < 0) return retcode;
-	return 0;
-}
-
-
-/* The drm_read and drm_write_string code (especially that which manages
-   the circular buffer), is based on Alessandro Rubini's LINUX DEVICE
-   DRIVERS (Cambridge: O'Reilly, 1998), pages 111-113. */
-
-ssize_t drm_read(struct file *filp, char *buf, size_t count, loff_t *off)
-{
-	drm_file_t    *priv   = filp->private_data;
-	drm_device_t  *dev    = priv->dev;
-	int	      left;
-	int	      avail;
-	int	      send;
-	int	      cur;
-
-	DRM_DEBUG("%p, %p\n", dev->buf_rp, dev->buf_wp);
-	
-	while (dev->buf_rp == dev->buf_wp) {
-		DRM_DEBUG("  sleeping\n");
-		if (filp->f_flags & O_NONBLOCK) {
-			return -EAGAIN;
-		}
-		interruptible_sleep_on(&dev->buf_readers);
-		if (signal_pending(current)) {
-			DRM_DEBUG("  interrupted\n");
-			return -ERESTARTSYS;
-		}
-		DRM_DEBUG("  awake\n");
-	}
-
-	left  = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;
-	avail = DRM_BSZ - left;
-	send  = DRM_MIN(avail, count);
-
-	while (send) {
-		if (dev->buf_wp > dev->buf_rp) {
-			cur = DRM_MIN(send, dev->buf_wp - dev->buf_rp);
-		} else {
-			cur = DRM_MIN(send, dev->buf_end - dev->buf_rp);
-		}
-		if (copy_to_user(buf, dev->buf_rp, cur))
-			return -EFAULT;
-		dev->buf_rp += cur;
-		if (dev->buf_rp == dev->buf_end) dev->buf_rp = dev->buf;
-		send -= cur;
-	}
-	
-	wake_up_interruptible(&dev->buf_writers);
-	return DRM_MIN(avail, count);;
-}
-
-int drm_write_string(drm_device_t *dev, const char *s)
-{
-	int left   = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;
-	int send   = strlen(s);
-	int count;
-
-	DRM_DEBUG("%d left, %d to send (%p, %p)\n",
-		  left, send, dev->buf_rp, dev->buf_wp);
-	
-	if (left == 1 || dev->buf_wp != dev->buf_rp) {
-		DRM_ERROR("Buffer not empty (%d left, wp = %p, rp = %p)\n",
-			  left,
-			  dev->buf_wp,
-			  dev->buf_rp);
-	}
-
-	while (send) {
-		if (dev->buf_wp >= dev->buf_rp) {
-			count = DRM_MIN(send, dev->buf_end - dev->buf_wp);
-			if (count == left) --count; /* Leave a hole */
-		} else {
-			count = DRM_MIN(send, dev->buf_rp - dev->buf_wp - 1);
-		}
-		strncpy(dev->buf_wp, s, count);
-		dev->buf_wp += count;
-		if (dev->buf_wp == dev->buf_end) dev->buf_wp = dev->buf;
-		send -= count;
-	}
-
-#if LINUX_VERSION_CODE < 0x020315 && !defined(KILLFASYNCHASTHREEPARAMETERS)
-	/* The extra parameter to kill_fasync was added in 2.3.21, and is
-           _not_ present in _stock_ 2.2.14 and 2.2.15.  However, some
-           distributions patch 2.2.x kernels to add this parameter.  The
-           Makefile.linux attempts to detect this addition and defines
-           KILLFASYNCHASTHREEPARAMETERS if three parameters are found. */
-	if (dev->buf_async) kill_fasync(dev->buf_async, SIGIO);
-#else
-
-				/* Parameter added in 2.3.21. */
-#if LINUX_VERSION_CODE < 0x020400
-	if (dev->buf_async) kill_fasync(dev->buf_async, SIGIO, POLL_IN);
-#else
-				/* Type of first parameter changed in
-                                   Linux 2.4.0-test2... */
-	if (dev->buf_async) kill_fasync(&dev->buf_async, SIGIO, POLL_IN);
-#endif
-#endif
-	DRM_DEBUG("waking\n");
-	wake_up_interruptible(&dev->buf_readers);
-	return 0;
-}
-
-unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait)
-{
-	drm_file_t   *priv = filp->private_data;
-	drm_device_t *dev  = priv->dev;
-
-	poll_wait(filp, &dev->buf_readers, wait);
-	if (dev->buf_wp != dev->buf_rp) return POLLIN | POLLRDNORM;
-	return 0;
-}