patch-2.4.8 linux/drivers/char/drm/i810_bufs.c

• Lines: 340
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.7/linux/drivers/char/drm/i810_bufs.c
• Orig date: Wed Jul 25 17:10:19 2001

diff -u --recursive --new-file v2.4.7/linux/drivers/char/drm/i810_bufs.c linux/drivers/char/drm/i810_bufs.c
@@ -1,339 +0,0 @@
-/* i810_bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
- * Created: Thu Jan 6 01:47:26 2000 by jhartmann@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>
- *	    Jeff Hartmann <jhartmann@valinux.com>
- * 
- */
-
-#define __NO_VERSION__
-#include "drmP.h"
-#include "i810_drv.h"
-#include "linux/un.h"
-
-int i810_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;
-	agp_offset = request.agp_start;
-	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;
-   
-	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 */
-	}
-
-	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;
-   
-	while(entry->buf_count < 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 = offset;
-		buf->bus_address = dev->agp->base + agp_offset + offset;
-		buf->address = (void *)(agp_offset + offset + dev->agp->base);
-		buf->next = NULL;
-		buf->waiting = 0;
-		buf->pending = 0;
-		init_waitqueue_head(&buf->dma_wait);
-		buf->pid = 0;
-
-		buf->dev_private = drm_alloc(sizeof(drm_i810_buf_priv_t), 
-					     DRM_MEM_BUFS);
-		buf->dev_priv_size = sizeof(drm_i810_buf_priv_t);
-	   	memset(buf->dev_private, 0, sizeof(drm_i810_buf_priv_t));
-
-#if DRM_DMA_HISTOGRAM
-		buf->time_queued = 0;
-		buf->time_dispatched = 0;
-		buf->time_completed = 0;
-		buf->time_freed = 0;
-#endif
-		offset = offset + alignment;
-		entry->buf_count++;
-		byte_count += PAGE_SIZE << page_order;
-      
-		DRM_DEBUG("buffer %d @ %p\n",
-			  entry->buf_count, buf->address);
-	}
-   
-	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;
-   
-	atomic_dec(&dev->buf_alloc);
-	dma->flags = _DRM_DMA_USE_AGP;
-	return 0;
-}
-
-int i810_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
-		unsigned long arg)
-{
-	drm_buf_desc_t	 request;
-
-	if (copy_from_user(&request,
-			   (drm_buf_desc_t *)arg,
-			   sizeof(request)))
-		return -EFAULT;
-
-	if(request.flags & _DRM_AGP_BUFFER)
-		return i810_addbufs_agp(inode, filp, cmd, arg);
-	else
-		return -EINVAL;
-}
-
-int i810_infobufs(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_info_t	 request;
-	int		 i;
-	int		 count;
-
-	if (!dma) return -EINVAL;
-
-	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_info_t *)arg,
-			   sizeof(request)))
-		return -EFAULT;
-
-	for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
-		if (dma->bufs[i].buf_count) ++count;
-	}
-	
-	DRM_DEBUG("count = %d\n", count);
-	
-	if (request.count >= count) {
-		for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
-			if (dma->bufs[i].buf_count) {
-				if (copy_to_user(&request.list[count].count,
-						 &dma->bufs[i].buf_count,
-						 sizeof(dma->bufs[0]
-							.buf_count)) ||
-				    copy_to_user(&request.list[count].size,
-						 &dma->bufs[i].buf_size,
-						 sizeof(dma->bufs[0].buf_size)) ||
-				    copy_to_user(&request.list[count].low_mark,
-						 &dma->bufs[i]
-						 .freelist.low_mark,
-						 sizeof(dma->bufs[0]
-							.freelist.low_mark)) ||
-				    copy_to_user(&request.list[count]
-						 .high_mark,
-						 &dma->bufs[i]
-						 .freelist.high_mark,
-						 sizeof(dma->bufs[0]
-							.freelist.high_mark)))
-					return -EFAULT;
-
-				DRM_DEBUG("%d %d %d %d %d\n",
-					  i,
-					  dma->bufs[i].buf_count,
-					  dma->bufs[i].buf_size,
-					  dma->bufs[i].freelist.low_mark,
-					  dma->bufs[i].freelist.high_mark);
-				++count;
-			}
-		}
-	}
-	request.count = count;
-
-	if (copy_to_user((drm_buf_info_t *)arg,
-			 &request,
-			 sizeof(request)))
-		return -EFAULT;
-	
-	return 0;
-}
-
-int i810_markbufs(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;
-	int		 order;
-	drm_buf_entry_t	 *entry;
-
-	if (!dma) return -EINVAL;
-
-	if (copy_from_user(&request,
-			   (drm_buf_desc_t *)arg,
-			   sizeof(request)))
-		return -EFAULT;
-
-	DRM_DEBUG("%d, %d, %d\n",
-		  request.size, request.low_mark, request.high_mark);
-	order = drm_order(request.size);
-	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
-	entry = &dma->bufs[order];
-
-	if (request.low_mark < 0 || request.low_mark > entry->buf_count)
-		return -EINVAL;
-	if (request.high_mark < 0 || request.high_mark > entry->buf_count)
-		return -EINVAL;
-
-	entry->freelist.low_mark  = request.low_mark;
-	entry->freelist.high_mark = request.high_mark;
-	
-	return 0;
-}
-
-int i810_freebufs(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_free_t	 request;
-	int		 i;
-	int		 idx;
-	drm_buf_t	 *buf;
-
-	if (!dma) return -EINVAL;
-
-	if (copy_from_user(&request,
-			   (drm_buf_free_t *)arg,
-			   sizeof(request)))
-		return -EFAULT;
-
-	DRM_DEBUG("%d\n", request.count);
-	for (i = 0; i < request.count; i++) {
-		if (copy_from_user(&idx,
-				   &request.list[i],
-				   sizeof(idx)))
-			return -EFAULT;
-		if (idx < 0 || idx >= dma->buf_count) {
-			DRM_ERROR("Index %d (of %d max)\n",
-				  idx, dma->buf_count - 1);
-			return -EINVAL;
-		}
-		buf = dma->buflist[idx];
-		if (buf->pid != current->pid) {
-			DRM_ERROR("Process %d freeing buffer owned by %d\n",
-				  current->pid, buf->pid);
-			return -EINVAL;
-		}
-		drm_free_buffer(dev, buf);
-	}
-	
-	return 0;
-}
-