Split declarations/definitions in drm_scatter.h into drm_sg.h/drm_sg_tmp.h

    respectively. Splited the work out of the ioctls and renamed (with the
    _ioctl prefix). Added some more documentation. Did the same for
    drm_sgpsupport.h.

1 files changed, 0 insertions, 229 deletions

diff --git a/linux-core/drm_scatter.c b/linux-core/drm_scatter.c
deleted file mode 100644
index 45a30fc3..00000000
--- a/linux-core/drm_scatter.c
+++ /dev/null
@@ -1,229 +0,0 @@
-/**
- * \file drm_scatter.h 
- * IOCTLs to manage scatter/gather memory
- *
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Mon Dec 18 23:20:54 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.
- */
-
-#define __NO_VERSION__
-#include <linux/config.h>
-#include <linux/vmalloc.h>
-#include "drmP.h"
-
-#define DEBUG_SCATTER 0
-
-void DRM(sg_cleanup)( drm_sg_mem_t *entry )
-{
-	struct page *page;
-	int i;
-
-	for ( i = 0 ; i < entry->pages ; i++ ) {
-		page = entry->pagelist[i];
-		if ( page )
-			ClearPageReserved( page );
-	}
-
-	vfree( entry->virtual );
-
-	DRM(free)( entry->busaddr,
-		   entry->pages * sizeof(*entry->busaddr),
-		   DRM_MEM_PAGES );
-	DRM(free)( entry->pagelist,
-		   entry->pages * sizeof(*entry->pagelist),
-		   DRM_MEM_PAGES );
-	DRM(free)( entry,
-		   sizeof(*entry),
-		   DRM_MEM_SGLISTS );
-}
-
-int DRM(sg_alloc)( 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_scatter_gather_t request;
-	drm_sg_mem_t *entry;
-	unsigned long pages, i, j;
-
-	DRM_DEBUG( "%s\n", __FUNCTION__ );
-
-	if ( dev->sg )
-		return -EINVAL;
-
-	if ( copy_from_user( &request,
-			     (drm_scatter_gather_t *)arg,
-			     sizeof(request) ) )
-		return -EFAULT;
-
-	entry = DRM(alloc)( sizeof(*entry), DRM_MEM_SGLISTS );
-	if ( !entry )
-		return -ENOMEM;
-
-   	memset( entry, 0, sizeof(*entry) );
-
-	pages = (request.size + PAGE_SIZE - 1) / PAGE_SIZE;
-	DRM_DEBUG( "sg size=%ld pages=%ld\n", request.size, pages );
-
-	entry->pages = pages;
-	entry->pagelist = DRM(alloc)( pages * sizeof(*entry->pagelist),
-				     DRM_MEM_PAGES );
-	if ( !entry->pagelist ) {
-		DRM(free)( entry, sizeof(*entry), DRM_MEM_SGLISTS );
-		return -ENOMEM;
-	}
-
-	memset(entry->pagelist, 0, pages * sizeof(*entry->pagelist));
-
-	entry->busaddr = DRM(alloc)( pages * sizeof(*entry->busaddr),
-				     DRM_MEM_PAGES );
-	if ( !entry->busaddr ) {
-		DRM(free)( entry->pagelist,
-			   entry->pages * sizeof(*entry->pagelist),
-			   DRM_MEM_PAGES );
-		DRM(free)( entry,
-			   sizeof(*entry),
-			   DRM_MEM_SGLISTS );
-		return -ENOMEM;
-	}
-	memset( (void *)entry->busaddr, 0, pages * sizeof(*entry->busaddr) );
-
-	entry->virtual = vmalloc_32( pages << PAGE_SHIFT );
-	if ( !entry->virtual ) {
-		DRM(free)( entry->busaddr,
-			   entry->pages * sizeof(*entry->busaddr),
-			   DRM_MEM_PAGES );
-		DRM(free)( entry->pagelist,
-			   entry->pages * sizeof(*entry->pagelist),
-			   DRM_MEM_PAGES );
-		DRM(free)( entry,
-			   sizeof(*entry),
-			   DRM_MEM_SGLISTS );
-		return -ENOMEM;
-	}
-
-	/* This also forces the mapping of COW pages, so our page list
-	 * will be valid.  Please don't remove it...
-	 */
-	memset( entry->virtual, 0, pages << PAGE_SHIFT );
-
-	entry->handle = (unsigned long)entry->virtual;
-
-	DRM_DEBUG( "sg alloc handle  = %08lx\n", entry->handle );
-	DRM_DEBUG( "sg alloc virtual = %p\n", entry->virtual );
-
-	for ( i = entry->handle, j = 0 ; j < pages ; i += PAGE_SIZE, j++ ) {
-		entry->pagelist[j] = vmalloc_to_page((void *)i);
-		if (!entry->pagelist[j])
-			goto failed;
-		SetPageReserved(entry->pagelist[j]);
-	}
-
-	request.handle = entry->handle;
-
-	if ( copy_to_user( (drm_scatter_gather_t *)arg,
-			   &request,
-			   sizeof(request) ) ) {
-		DRM(sg_cleanup)( entry );
-		return -EFAULT;
-	}
-
-	dev->sg = entry;
-
-#if DEBUG_SCATTER
-	/* Verify that each page points to its virtual address, and vice
-	 * versa.
-	 */
-	{
-	int error = 0;
-
-	for ( i = 0 ; i < pages ; i++ ) {
-		unsigned long *tmp;
-
-		tmp = page_address( entry->pagelist[i] );
-		for ( j = 0 ;
-		      j < PAGE_SIZE / sizeof(unsigned long) ;
-		      j++, tmp++ ) {
-			*tmp = 0xcafebabe;
-		}
-		tmp = (unsigned long *)((u8 *)entry->virtual +
-					(PAGE_SIZE * i));
-		for( j = 0 ;
-		     j < PAGE_SIZE / sizeof(unsigned long) ;
-		     j++, tmp++ ) {
-			if ( *tmp != 0xcafebabe && error == 0 ) {
-				error = 1;
-				DRM_ERROR( "Scatter allocation error, "
-					   "pagelist does not match "
-					   "virtual mapping\n" );
-			}
-		}
-		tmp = page_address( entry->pagelist[i] );
-		for(j = 0 ;
-		    j < PAGE_SIZE / sizeof(unsigned long) ;
-		    j++, tmp++) {
-			*tmp = 0;
-		}
-	}
-	if (error == 0)
-		DRM_ERROR( "Scatter allocation matches pagelist\n" );
-	}
-#endif
-
-	return 0;
-
- failed:
-	DRM(sg_cleanup)( entry );
-	return -ENOMEM;
-}
-
-int DRM(sg_free)( 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_scatter_gather_t request;
-	drm_sg_mem_t *entry;
-
-	if ( copy_from_user( &request,
-			     (drm_scatter_gather_t *)arg,
-			     sizeof(request) ) )
-		return -EFAULT;
-
-	entry = dev->sg;
-	dev->sg = NULL;
-
-	if ( !entry || entry->handle != request.handle )
-		return -EINVAL;
-
-	DRM_DEBUG( "sg free virtual  = %p\n", entry->virtual );
-
-	DRM(sg_cleanup)( entry );
-
-	return 0;
-}