diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_ioc32.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_ioc32.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_ioc32.c b/drivers/gpu/drm/nouveau/nouveau_ioc32.c new file mode 100644 index 0000000000..adf01ca9e0 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nouveau_ioc32.c @@ -0,0 +1,70 @@ +/** + * \file mga_ioc32.c + * + * 32-bit ioctl compatibility routines for the MGA DRM. + * + * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich + * + * + * Copyright (C) Paul Mackerras 2005 + * Copyright (C) Egbert Eich 2003,2004 + * Copyright (C) Dave Airlie 2005 + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include <linux/compat.h> + +#include <drm/drm.h> +#include <drm/drm_ioctl.h> + +#include "nouveau_ioctl.h" + +/** + * Called whenever a 32-bit process running under a 64-bit kernel + * performs an ioctl on /dev/dri/card<n>. + * + * \param filp file pointer. + * \param cmd command. + * \param arg user argument. + * \return zero on success or negative number on failure. + */ +long nouveau_compat_ioctl(struct file *filp, unsigned int cmd, + unsigned long arg) +{ + unsigned int nr = DRM_IOCTL_NR(cmd); + drm_ioctl_compat_t *fn = NULL; + int ret; + + if (nr < DRM_COMMAND_BASE) + return drm_compat_ioctl(filp, cmd, arg); + +#if 0 + if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls)) + fn = nouveau_compat_ioctls[nr - DRM_COMMAND_BASE]; +#endif + if (fn != NULL) + ret = (*fn)(filp, cmd, arg); + else + ret = nouveau_drm_ioctl(filp, cmd, arg); + + return ret; +} |