From 6611a5fb7f41f81e38391c77903d98a29937ceed Mon Sep 17 00:00:00 2001 From: Jose Fonseca Date: Tue, 3 Jun 2003 23:27:01 +0000 Subject: 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. --- linux-core/drm_scatter.c | 229 ----------------------------------------------- 1 file changed, 229 deletions(-) delete mode 100644 linux-core/drm_scatter.c (limited to 'linux-core/drm_scatter.c') 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 - */ - -/* - * 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 -#include -#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; -} -- cgit v1.2.3