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