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

• Lines: 544
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.7/linux/drivers/char/drm/bufs.c
• Orig date: Wed Jul 25 17:10:19 2001

diff -u --recursive --new-file v2.4.7/linux/drivers/char/drm/bufs.c linux/drivers/char/drm/bufs.c
@@ -1,543 +0,0 @@
-/* bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
- * Created: Tue Feb  2 08:37:54 1999 by faith@precisioninsight.com
- *
- * Copyright 1999, 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:
- *    Rickard E. (Rik) Faith <faith@valinux.com>
- *
- */
-
-#define __NO_VERSION__
-#include <linux/config.h>
-#include "drmP.h"
-#include "linux/un.h"
-
-				/* Compute order.  Can be made faster. */
-int drm_order(unsigned long size)
-{
-	int	      order;
-	unsigned long tmp;
-
-	for (order = 0, tmp = size; tmp >>= 1; ++order);
-	if (size & ~(1 << order)) ++order;
-	return order;
-}
-
-int drm_addmap(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;
-	
-	if (!(filp->f_mode & 3)) return -EACCES; /* Require read/write */
-
-	map	     = drm_alloc(sizeof(*map), DRM_MEM_MAPS);
-	if (!map) return -ENOMEM;
-	if (copy_from_user(map, (drm_map_t *)arg, sizeof(*map))) {
-		drm_free(map, sizeof(*map), DRM_MEM_MAPS);
-		return -EFAULT;
-	}
-
-	DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n",
-		  map->offset, map->size, map->type);
-	if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
-		drm_free(map, sizeof(*map), DRM_MEM_MAPS);
-		return -EINVAL;
-	}
-	map->mtrr   = -1;
-	map->handle = 0;
-
-	switch (map->type) {
-	case _DRM_REGISTERS:
-	case _DRM_FRAME_BUFFER:
-#ifndef __sparc__
-		if (map->offset + map->size < map->offset
-		    || map->offset < virt_to_phys(high_memory)) {
-			drm_free(map, sizeof(*map), DRM_MEM_MAPS);
-			return -EINVAL;
-		}
-#endif
-#ifdef CONFIG_MTRR
-		if (map->type == _DRM_FRAME_BUFFER
-		    || (map->flags & _DRM_WRITE_COMBINING)) {
-			map->mtrr = mtrr_add(map->offset, map->size,
-					     MTRR_TYPE_WRCOMB, 1);
-		}
-#endif
-		map->handle = drm_ioremap(map->offset, map->size);
-		break;
-			
-
-	case _DRM_SHM:
-		map->handle = (void *)drm_alloc_pages(drm_order(map->size)
-						      - PAGE_SHIFT,
-						      DRM_MEM_SAREA);
-		DRM_DEBUG("%ld %d %p\n", map->size, drm_order(map->size),
-			  map->handle);
-		if (!map->handle) {
-			drm_free(map, sizeof(*map), DRM_MEM_MAPS);
-			return -ENOMEM;
-		}
-		map->offset = (unsigned long)map->handle;
-		if (map->flags & _DRM_CONTAINS_LOCK) {
-			dev->lock.hw_lock = map->handle; /* Pointer to lock */
-		}
-		break;
-#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
-	case _DRM_AGP:
-		map->offset = map->offset + dev->agp->base;
-		break;
-#endif
-	default:
-		drm_free(map, sizeof(*map), DRM_MEM_MAPS);
-		return -EINVAL;
-	}
-
-	down(&dev->struct_sem);
-	if (dev->maplist) {
-		++dev->map_count;
-		dev->maplist = drm_realloc(dev->maplist,
-					   (dev->map_count-1)
-					   * sizeof(*dev->maplist),
-					   dev->map_count
-					   * sizeof(*dev->maplist),
-					   DRM_MEM_MAPS);
-	} else {
-		dev->map_count = 1;
-		dev->maplist = drm_alloc(dev->map_count*sizeof(*dev->maplist),
-					 DRM_MEM_MAPS);
-	}
-	dev->maplist[dev->map_count-1] = map;
-	up(&dev->struct_sem);
-
-	if (copy_to_user((drm_map_t *)arg, map, sizeof(*map)))
-		return -EFAULT;
-	if (map->type != _DRM_SHM) {
-		if (copy_to_user(&((drm_map_t *)arg)->handle,
-				 &map->offset,
-				 sizeof(map->offset)))
-			return -EFAULT;
-	}		
-	return 0;
-}
-
-int drm_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_device_dma_t *dma	 = dev->dma;
-	drm_buf_desc_t	 request;
-	int		 count;
-	int		 order;
-	int		 size;
-	int		 total;
-	int		 page_order;
-	drm_buf_entry_t	 *entry;
-	unsigned long	 page;
-	drm_buf_t	 *buf;
-	int		 alignment;
-	unsigned long	 offset;
-	int		 i;
-	int		 byte_count;
-	int		 page_count;
-
-	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;
-	
-	DRM_DEBUG("count = %d, size = %d (%d), order = %d, queue_count = %d\n",
-		  request.count, request.size, size, order, dev->queue_count);
-
-	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
-	if (dev->queue_count) return -EBUSY; /* Not while in use */
-
-	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;
-
-	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);
-		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->seglist = drm_alloc(count * sizeof(*entry->seglist),
-				   DRM_MEM_SEGS);
-	if (!entry->seglist) {
-		drm_free(entry->buflist,
-			 count * sizeof(*entry->buflist),
-			 DRM_MEM_BUFS);
-		up(&dev->struct_sem);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;
-	}
-	memset(entry->seglist, 0, count * sizeof(*entry->seglist));
-
-	dma->pagelist = drm_realloc(dma->pagelist,
-				    dma->page_count * sizeof(*dma->pagelist),
-				    (dma->page_count + (count << page_order))
-				    * sizeof(*dma->pagelist),
-				    DRM_MEM_PAGES);
-	DRM_DEBUG("pagelist: %d entries\n",
-		  dma->page_count + (count << page_order));
-
-
-	entry->buf_size	  = size;
-	entry->page_order = page_order;
-	byte_count	  = 0;
-	page_count	  = 0;
-	while (entry->buf_count < count) {
-		if (!(page = drm_alloc_pages(page_order, DRM_MEM_DMA))) break;
-		entry->seglist[entry->seg_count++] = page;
-		for (i = 0; i < (1 << page_order); i++) {
-			DRM_DEBUG("page %d @ 0x%08lx\n",
-				  dma->page_count + page_count,
-				  page + PAGE_SIZE * i);
-			dma->pagelist[dma->page_count + page_count++]
-				= page + PAGE_SIZE * i;
-		}
-		for (offset = 0;
-		     offset + size <= total && 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 + byte_count + offset);
-			buf->address = (void *)(page + offset);
-			buf->next    = NULL;
-			buf->waiting = 0;
-			buf->pending = 0;
-			init_waitqueue_head(&buf->dma_wait);
-			buf->pid     = 0;
-#if DRM_DMA_HISTOGRAM
-			buf->time_queued     = 0;
-			buf->time_dispatched = 0;
-			buf->time_completed  = 0;
-			buf->time_freed	     = 0;
-#endif
-			DRM_DEBUG("buffer %d @ %p\n",
-				  entry->buf_count, buf->address);
-		}
-		byte_count += PAGE_SIZE << page_order;
-	}
-
-	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->seg_count	+= entry->seg_count;
-	dma->page_count += entry->seg_count << page_order;
-	dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
-	
-	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);
-	return 0;
-}
-
-int drm_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 drm_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 drm_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;
-}
-
-int drm_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_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) 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) {
-		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;
-}