patch-2.4.8 linux/drivers/char/drm/r128_bufs.c

• Lines: 320
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.7/linux/drivers/char/drm/r128_bufs.c
• Orig date: Wed Jul 25 17:10:19 2001

diff -u --recursive --new-file v2.4.7/linux/drivers/char/drm/r128_bufs.c linux/drivers/char/drm/r128_bufs.c
@@ -1,319 +0,0 @@
-/* r128_bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
- * Created: Wed Apr 12 16:19:08 2000 by kevin@precisioninsight.com
- *
- * Copyright 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
- * 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: Kevin E. Martin <martin@valinux.com>
- *          Rickard E. (Rik) Faith <faith@valinux.com>
- *	    Jeff Hartmann <jhartmann@valinux.com>
- *
- */
-
-#define __NO_VERSION__
-#include <linux/config.h>
-#include "drmP.h"
-#include "r128_drv.h"
-#include "linux/un.h"
-
-
-#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
-int r128_addbufs_agp(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_device_dma_t *dma  = dev->dma;
-	drm_buf_desc_t    request;
-	drm_buf_entry_t  *entry;
-	drm_buf_t        *buf;
-	unsigned long     offset;
-	unsigned long     agp_offset;
-	int               count;
-	int               order;
-	int               size;
-	int               alignment;
-	int               page_order;
-	int               total;
-	int               byte_count;
-	int               i;
-
-	if (!dma) return -EINVAL;
-
-	if (copy_from_user(&request,
-			   (drm_buf_desc_t *)arg,
-			   sizeof(request)))
-		return -EFAULT;
-
-	count      = request.count;
-	order      = drm_order(request.size);
-	size       = 1 << order;
-
-	alignment  = (request.flags & _DRM_PAGE_ALIGN) ? PAGE_ALIGN(size):size;
-	page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
-	total      = PAGE_SIZE << page_order;
-
-	byte_count = 0;
-	agp_offset = dev->agp->base + request.agp_start;
-
-	DRM_DEBUG("count:      %d\n",  count);
-	DRM_DEBUG("order:      %d\n",  order);
-	DRM_DEBUG("size:       %d\n",  size);
-	DRM_DEBUG("agp_offset: %ld\n", agp_offset);
-	DRM_DEBUG("alignment:  %d\n",  alignment);
-	DRM_DEBUG("page_order: %d\n",  page_order);
-	DRM_DEBUG("total:      %d\n",  total);
-
-	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
-	if (dev->queue_count) return -EBUSY; /* Not while in use */
-
-	spin_lock(&dev->count_lock);
-	if (dev->buf_use) {
-		spin_unlock(&dev->count_lock);
-		return -EBUSY;
-	}
-	atomic_inc(&dev->buf_alloc);
-	spin_unlock(&dev->count_lock);
-
-	down(&dev->struct_sem);
-	entry = &dma->bufs[order];
-	if (entry->buf_count) {
-		up(&dev->struct_sem);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM; /* May only call once for each order */
-	}
-
-	/* Might be a poor limit, but take that up with XFree86 
-	   if its a problem */
-	   
-	if(count < 0 || count > 4096)
-	{
-		up(&dev->struct_sem);
-		atomic_dec(&dev->buf_alloc);
-		return -EINVAL;
-	}
-		
-	entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
-				   DRM_MEM_BUFS);
-	if (!entry->buflist) {
-		up(&dev->struct_sem);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;
-	}
-	memset(entry->buflist, 0, count * sizeof(*entry->buflist));
-
-	entry->buf_size   = size;
-	entry->page_order = page_order;
-	offset            = 0;
-
-	for (offset = 0;
-	     entry->buf_count < count;
-	     offset += alignment, ++entry->buf_count) {
-		buf          = &entry->buflist[entry->buf_count];
-		buf->idx     = dma->buf_count + entry->buf_count;
-		buf->total   = alignment;
-		buf->order   = order;
-		buf->used    = 0;
-		buf->offset  = (dma->byte_count + offset);
-		buf->address = (void *)(agp_offset + offset);
-		buf->next    = NULL;
-		buf->waiting = 0;
-		buf->pending = 0;
-		init_waitqueue_head(&buf->dma_wait);
-		buf->pid     = 0;
-
-		buf->dev_priv_size = sizeof(drm_r128_buf_priv_t);
-		buf->dev_private   = drm_alloc(sizeof(drm_r128_buf_priv_t),
-					       DRM_MEM_BUFS);
-		memset(buf->dev_private, 0, buf->dev_priv_size);
-
-#if DRM_DMA_HISTOGRAM
-		buf->time_queued     = 0;
-		buf->time_dispatched = 0;
-		buf->time_completed  = 0;
-		buf->time_freed      = 0;
-#endif
-
-		byte_count += PAGE_SIZE << page_order;
-
-		DRM_DEBUG("buffer %d @ %p\n",
-			  entry->buf_count, buf->address);
-	}
-
-	DRM_DEBUG("byte_count: %d\n", byte_count);
-
-	dma->buflist = drm_realloc(dma->buflist,
-				   dma->buf_count * sizeof(*dma->buflist),
-				   (dma->buf_count + entry->buf_count)
-				   * sizeof(*dma->buflist),
-				   DRM_MEM_BUFS);
-	for (i = dma->buf_count; i < dma->buf_count + entry->buf_count; i++)
-		dma->buflist[i] = &entry->buflist[i - dma->buf_count];
-
-	dma->buf_count  += entry->buf_count;
-	dma->byte_count += byte_count;
-
-	drm_freelist_create(&entry->freelist, entry->buf_count);
-	for (i = 0; i < entry->buf_count; i++) {
-		drm_freelist_put(dev, &entry->freelist, &entry->buflist[i]);
-	}
-
-	up(&dev->struct_sem);
-
-	request.count = entry->buf_count;
-	request.size  = size;
-
-	if (copy_to_user((drm_buf_desc_t *)arg,
-			 &request,
-			 sizeof(request)))
-		return -EFAULT;
-
-	dma->flags = _DRM_DMA_USE_AGP;
-
-	atomic_dec(&dev->buf_alloc);
-	return 0;
-}
-#endif
-
-int r128_addbufs(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_r128_private_t	*dev_priv	= dev->dev_private;
-	drm_buf_desc_t		request;
-
-	if (!dev_priv || dev_priv->is_pci) return -EINVAL;
-
-	if (copy_from_user(&request,
-			   (drm_buf_desc_t *)arg,
-			   sizeof(request)))
-		return -EFAULT;
-
-#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
-	if (request.flags & _DRM_AGP_BUFFER)
-		return r128_addbufs_agp(inode, filp, cmd, arg);
-	else
-#endif
-		return -EINVAL;
-}
-
-int r128_mapbufs(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_r128_private_t	*dev_priv	= dev->dev_private;
-	drm_device_dma_t	*dma		= dev->dma;
-	int			 retcode	= 0;
-	const int		 zero		= 0;
-	unsigned long		 virtual;
-	unsigned long		 address;
-	drm_buf_map_t		 request;
-	int			 i;
-
-	if (!dma || !dev_priv || dev_priv->is_pci) return -EINVAL;
-
-	DRM_DEBUG("\n");
-
-	spin_lock(&dev->count_lock);
-	if (atomic_read(&dev->buf_alloc)) {
-		spin_unlock(&dev->count_lock);
-		return -EBUSY;
-	}
-	++dev->buf_use;		/* Can't allocate more after this call */
-	spin_unlock(&dev->count_lock);
-
-	if (copy_from_user(&request,
-			   (drm_buf_map_t *)arg,
-			   sizeof(request)))
-		return -EFAULT;
-
-	if (request.count >= dma->buf_count) {
-		if (dma->flags & _DRM_DMA_USE_AGP) {
-			drm_map_t *map;
-
-			map = dev_priv->buffers;
-			if (!map) {
-				retcode = -EINVAL;
-				goto done;
-			}
-
-			down_write(&current->mm->mmap_sem);
-			virtual = do_mmap(filp, 0, map->size,
-					  PROT_READ|PROT_WRITE,
-					  MAP_SHARED,
-					  (unsigned long)map->offset);
-			up_write(&current->mm->mmap_sem);
-		} else {
-			down_write(&current->mm->mmap_sem);
-			virtual = do_mmap(filp, 0, dma->byte_count,
-					  PROT_READ|PROT_WRITE, MAP_SHARED, 0);
-			up_write(&current->mm->mmap_sem);
-		}
-		if (virtual > -1024UL) {
-			/* Real error */
-			retcode = (signed long)virtual;
-			goto done;
-		}
-		request.virtual = (void *)virtual;
-
-		for (i = 0; i < dma->buf_count; i++) {
-			if (copy_to_user(&request.list[i].idx,
-					 &dma->buflist[i]->idx,
-					 sizeof(request.list[0].idx))) {
-				retcode = -EFAULT;
-				goto done;
-			}
-			if (copy_to_user(&request.list[i].total,
-					 &dma->buflist[i]->total,
-					 sizeof(request.list[0].total))) {
-				retcode = -EFAULT;
-				goto done;
-			}
-			if (copy_to_user(&request.list[i].used,
-					 &zero,
-					 sizeof(zero))) {
-				retcode = -EFAULT;
-				goto done;
-			}
-			address = virtual + dma->buflist[i]->offset;
-			if (copy_to_user(&request.list[i].address,
-					 &address,
-					 sizeof(address))) {
-				retcode = -EFAULT;
-				goto done;
-			}
-		}
-	}
- done:
-	request.count = dma->buf_count;
-	DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode);
-
-	if (copy_to_user((drm_buf_map_t *)arg,
-			 &request,
-			 sizeof(request)))
-		return -EFAULT;
-
-	return retcode;
-}