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      1 /*	$NetBSD: nouveau_ioc32.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $	*/
      2 
      3 /**
      4  * \file mga_ioc32.c
      5  *
      6  * 32-bit ioctl compatibility routines for the MGA DRM.
      7  *
      8  * \author Dave Airlie <airlied (at) linux.ie> with code from patches by Egbert Eich
      9  *
     10  *
     11  * Copyright (C) Paul Mackerras 2005
     12  * Copyright (C) Egbert Eich 2003,2004
     13  * Copyright (C) Dave Airlie 2005
     14  * All Rights Reserved.
     15  *
     16  * Permission is hereby granted, free of charge, to any person obtaining a
     17  * copy of this software and associated documentation files (the "Software"),
     18  * to deal in the Software without restriction, including without limitation
     19  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     20  * and/or sell copies of the Software, and to permit persons to whom the
     21  * Software is furnished to do so, subject to the following conditions:
     22  *
     23  * The above copyright notice and this permission notice (including the next
     24  * paragraph) shall be included in all copies or substantial portions of the
     25  * Software.
     26  *
     27  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     28  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     29  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     30  * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
     31  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     32  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     33  * IN THE SOFTWARE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: nouveau_ioc32.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $");
     38 
     39 #include <linux/compat.h>
     40 
     41 #include <drm/drm.h>
     42 #include <drm/drm_ioctl.h>
     43 
     44 #include "nouveau_ioctl.h"
     45 
     46 /**
     47  * Called whenever a 32-bit process running under a 64-bit kernel
     48  * performs an ioctl on /dev/dri/card<n>.
     49  *
     50  * \param filp file pointer.
     51  * \param cmd command.
     52  * \param arg user argument.
     53  * \return zero on success or negative number on failure.
     54  */
     55 long nouveau_compat_ioctl(struct file *filp, unsigned int cmd,
     56 			 unsigned long arg)
     57 {
     58 	unsigned int nr = DRM_IOCTL_NR(cmd);
     59 	drm_ioctl_compat_t *fn = NULL;
     60 	int ret;
     61 
     62 	if (nr < DRM_COMMAND_BASE)
     63 		return drm_compat_ioctl(filp, cmd, arg);
     64 
     65 #if 0
     66 	if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls))
     67 		fn = nouveau_compat_ioctls[nr - DRM_COMMAND_BASE];
     68 #endif
     69 	if (fn != NULL)
     70 		ret = (*fn)(filp, cmd, arg);
     71 	else
     72 		ret = nouveau_drm_ioctl(filp, cmd, arg);
     73 
     74 	return ret;
     75 }
     76