1 files changed, 491 insertions, 0 deletions

diff --git a/linux/mach64_bufs.c b/linux/mach64_bufs.c
new file mode 100644
index 00000000..d907481a
--- /dev/null
+++ b/linux/mach64_bufs.c
@@ -0,0 +1,491 @@
+/* mach64_bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
+ * Created: Thu Jan 6 01:47:26 2000 by gareth@valinux.com
+ *
+ * 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>
+ *	    Gareth Hughes <gareth@valinux.com>
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+#include "mach64_drv.h"
+#include "linux/un.h"
+
+int mach64_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 */
+	}
+
+	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_mach64_buf_priv_t),
+					      DRM_MEM_BUFS );
+		buf->dev_priv_size = sizeof(drm_mach64_buf_priv_t);
+	   	memset( buf->dev_private, 0, sizeof(drm_mach64_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 = 0 ; i < entry->buf_count ; i++ ) {
+		dma->buflist[i + dma->buf_count] = &entry->buflist[i];
+	}
+
+	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 mach64_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;
+
+	copy_from_user_ret(&request,
+			   (drm_buf_desc_t *)arg,
+			   sizeof(request),
+			   -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 */
+	}
+
+	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 mach64_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 mach64_addbufs_agp( inode, filp, cmd, arg );
+	} else {
+		return mach64_addbufs_pci( inode, filp, cmd, arg );
+	}
+}
+
+int mach64_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( "%s: count = %d\n", __FUNCTION__, 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) ) )
+					return -EFAULT;
+				if ( copy_to_user( &request.list[count].size,
+						   &dma->bufs[i].buf_size,
+						   sizeof(dma->bufs[0].buf_size) ) )
+					return -EFAULT;
+				if ( copy_to_user( &request.list[count].low_mark,
+						   &dma->bufs[i].freelist.low_mark,
+						   sizeof(dma->bufs[0].freelist.low_mark) ) )
+					return -EFAULT;
+				if ( 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( "%s: %d %d %d %d %d\n",
+					   __FUNCTION__, 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 mach64_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( "%s: %d, %d, %d\n",
+		   __FUNCTION__, 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 mach64_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( "%s: count = %d\n", __FUNCTION__, 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;
+}