nouveau_ioc32.c 2.2 KB

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  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. #include <linux/compat.h>
  34. #include <drm/drm.h>
  35. #include <drm/drm_ioctl.h>
  36. #include "nouveau_ioctl.h"
  37. /**
  38. * Called whenever a 32-bit process running under a 64-bit kernel
  39. * performs an ioctl on /dev/dri/card<n>.
  40. *
  41. * \param filp file pointer.
  42. * \param cmd command.
  43. * \param arg user argument.
  44. * \return zero on success or negative number on failure.
  45. */
  46. long nouveau_compat_ioctl(struct file *filp, unsigned int cmd,
  47. unsigned long arg)
  48. {
  49. unsigned int nr = DRM_IOCTL_NR(cmd);
  50. drm_ioctl_compat_t *fn = NULL;
  51. int ret;
  52. if (nr < DRM_COMMAND_BASE)
  53. return drm_compat_ioctl(filp, cmd, arg);
  54. #if 0
  55. if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls))
  56. fn = nouveau_compat_ioctls[nr - DRM_COMMAND_BASE];
  57. #endif
  58. if (fn != NULL)
  59. ret = (*fn)(filp, cmd, arg);
  60. else
  61. ret = nouveau_drm_ioctl(filp, cmd, arg);
  62. return ret;
  63. }