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1/*2 * \file mga_ioc32.c3 *4 * 32-bit ioctl compatibility routines for the MGA DRM.5 *6 * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich7 *8 *9 * Copyright (C) Paul Mackerras 200510 * Copyright (C) Egbert Eich 2003,200411 * Copyright (C) Dave Airlie 200512 * All Rights Reserved.13 *14 * Permission is hereby granted, free of charge, to any person obtaining a15 * copy of this software and associated documentation files (the "Software"),16 * to deal in the Software without restriction, including without limitation17 * the rights to use, copy, modify, merge, publish, distribute, sublicense,18 * and/or sell copies of the Software, and to permit persons to whom the19 * Software is furnished to do so, subject to the following conditions:20 *21 * The above copyright notice and this permission notice (including the next22 * paragraph) shall be included in all copies or substantial portions of the23 * Software.24 *25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR26 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,27 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL28 * 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 DEALINGS31 * IN THE SOFTWARE.32 */33 34#include <linux/compat.h>35 36#include <drm/drm.h>37#include <drm/drm_ioctl.h>38 39#include "nouveau_ioctl.h"40 41/*42 * Called whenever a 32-bit process running under a 64-bit kernel43 * performs an ioctl on /dev/dri/card<n>.44 *45 * \param filp file pointer.46 * \param cmd command.47 * \param arg user argument.48 * \return zero on success or negative number on failure.49 */50long nouveau_compat_ioctl(struct file *filp, unsigned int cmd,51 unsigned long arg)52{53 unsigned int nr = DRM_IOCTL_NR(cmd);54 drm_ioctl_compat_t *fn = NULL;55 int ret;56 57 if (nr < DRM_COMMAND_BASE)58 return drm_compat_ioctl(filp, cmd, arg);59 60#if 061 if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls))62 fn = nouveau_compat_ioctls[nr - DRM_COMMAND_BASE];63#endif64 if (fn != NULL)65 ret = (*fn)(filp, cmd, arg);66 else67 ret = nouveau_drm_ioctl(filp, cmd, arg);68 69 return ret;70}71