3 $XFree86: xc/programs/Xserver/hw/xfree86/etc/scanpci.c,v 3.34.2.17 1998/11/10 11:55:40 dawes Exp $
4 Modified for readability by Nick Kurshev
7 * Copyright 1995 by Robin Cutshaw <robin@XFree86.Org>
9 * Permission to use, copy, modify, distribute, and sell this software and its
10 * documentation for any purpose is hereby granted without fee, provided that
11 * the above copyright notice appear in all copies and that both that
12 * copyright notice and this permission notice appear in supporting
13 * documentation, and that the names of the above listed copyright holder(s)
14 * not be used in advertising or publicity pertaining to distribution of
15 * the software without specific, written prior permission. The above listed
16 * copyright holder(s) make(s) no representations about the suitability of this
17 * software for any purpose. It is provided "as is" without express or
20 * THE ABOVE LISTED COPYRIGHT HOLDER(S) DISCLAIM(S) ALL WARRANTIES WITH REGARD
21 * TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
22 * AND FITNESS, IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE
23 * LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
24 * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
25 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
26 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
30 #include <ddk/ntddk.h>
31 #include "vidix/dhahelperwin/dhahelper.h"
33 static HANDLE hDriver
;
40 static __inline__
int enable_os_io(void)
43 DWORD dwBytesReturned
;
44 hDriver
= CreateFile("\\\\.\\DHAHELPER",GENERIC_READ
| GENERIC_WRITE
,0,NULL
,OPEN_EXISTING
,FILE_ATTRIBUTE_NORMAL
,NULL
);
45 if(!DeviceIoControl(hDriver
, IOCTL_DHAHELPER_ENABLEDIRECTIO
, NULL
,0, NULL
, 0, &dwBytesReturned
, NULL
)){
46 fprintf(stderr
,"Unable to enable directio please install dhahelper.sys.\n");
53 static __inline__
int disable_os_io(void)
56 DWORD dwBytesReturned
;
57 DeviceIoControl(hDriver
, IOCTL_DHAHELPER_DISABLEDIRECTIO
, NULL
,0, NULL
, 0, &dwBytesReturned
, NULL
);