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

• Lines: 630
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.7/linux/drivers/char/drm/mga_bufs.c
• Orig date: Wed Jul 25 17:10:19 2001

diff -u --recursive --new-file v2.4.7/linux/drivers/char/drm/mga_bufs.c linux/drivers/char/drm/mga_bufs.c
@@ -1,629 +0,0 @@
-/* mga_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 "mga_drv.h"
-#include "linux/un.h"
-
-
-int mga_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;
-
-	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);
-	DRM_DEBUG("byte_count: %d\n", byte_count);
-
-	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 */
-	}
-
-	/* This isnt neccessarily a good limit, but we have to stop a dumb
-	   32 bit overflow problem below */
-	   
-	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; /* Hrm */
-		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_mga_buf_priv_t),
-					     DRM_MEM_BUFS);
-		buf->dev_priv_size = sizeof(drm_mga_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;
-	}
-   
-	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;
-
-	DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
-
-	dma->byte_count += byte_count;
-
-	DRM_DEBUG("entry->buf_count : %d\n", entry->buf_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);
-
-	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);
-	DRM_DEBUG("byte_count: %d\n", byte_count);
-
-	dma->flags = _DRM_DMA_USE_AGP;
-
-	DRM_DEBUG("dma->flags : %x\n", dma->flags);
-
-	return 0;
-}
-
-int mga_addbufs_pci(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);
-		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->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 mga_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 mga_addbufs_agp(inode, filp, cmd, arg);
-	else
-		return mga_addbufs_pci(inode, filp, cmd, arg);
-}
-
-int mga_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;
-	}
-	
-	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;
-				++count;
-			}
-		}
-	}
-	request.count = count;
-
-	if (copy_to_user((drm_buf_info_t *)arg,
-			 &request,
-			 sizeof(request)))
-		return -EFAULT;
-	
-	return 0;
-}
-
-int mga_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;
-
-	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 mga_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;
-
-	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 mga_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;
-	
-	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_mga_private_t *dev_priv = dev->dev_private;
-			drm_map_t *map = NULL;
-	 
-			map = dev->maplist[dev_priv->buffer_map_idx];
-			if (!map) {
-				retcode = -EINVAL;
-				goto done;
-			}
-
-			DRM_DEBUG("map->offset : %lx\n", map->offset);
-			DRM_DEBUG("map->size : %lx\n", map->size);
-			DRM_DEBUG("map->type : %d\n", map->type);
-			DRM_DEBUG("map->flags : %x\n", map->flags);
-			DRM_DEBUG("map->handle : %p\n", map->handle);
-			DRM_DEBUG("map->mtrr : %d\n", map->mtrr);
-			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 */
-			DRM_DEBUG("mmap error\n");
-			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;
-
-	DRM_DEBUG("retcode : %d\n", retcode);
-
-	return retcode;
-}