cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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nouveau_ioc32.c (2242B)

      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/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 kernel
     43 * 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 0
     61	if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls))
     62		fn = nouveau_compat_ioctls[nr - DRM_COMMAND_BASE];
     63#endif
     64	if (fn != NULL)
     65		ret = (*fn)(filp, cmd, arg);
     66	else
     67		ret = nouveau_drm_ioctl(filp, cmd, arg);
     68
     69	return ret;
     70}