drm_debugfs.h 3.4 KB

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  1. /*
  2. * Internal Header for the Direct Rendering Manager
  3. *
  4. * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  5. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  6. * Copyright (c) 2009-2010, Code Aurora Forum.
  7. * All rights reserved.
  8. *
  9. * Author: Rickard E. (Rik) Faith <[email protected]>
  10. * Author: Gareth Hughes <[email protected]>
  11. *
  12. * Permission is hereby granted, free of charge, to any person obtaining a
  13. * copy of this software and associated documentation files (the "Software"),
  14. * to deal in the Software without restriction, including without limitation
  15. * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  16. * and/or sell copies of the Software, and to permit persons to whom the
  17. * Software is furnished to do so, subject to the following conditions:
  18. *
  19. * The above copyright notice and this permission notice (including the next
  20. * paragraph) shall be included in all copies or substantial portions of the
  21. * Software.
  22. *
  23. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  24. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  25. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  26. * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  27. * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  28. * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  29. * OTHER DEALINGS IN THE SOFTWARE.
  30. */
  31. #ifndef _DRM_DEBUGFS_H_
  32. #define _DRM_DEBUGFS_H_
  33. #include <linux/types.h>
  34. #include <linux/seq_file.h>
  35. /**
  36. * struct drm_info_list - debugfs info list entry
  37. *
  38. * This structure represents a debugfs file to be created by the drm
  39. * core.
  40. */
  41. struct drm_info_list {
  42. /** @name: file name */
  43. const char *name;
  44. /**
  45. * @show:
  46. *
  47. * Show callback. &seq_file->private will be set to the &struct
  48. * drm_info_node corresponding to the instance of this info on a given
  49. * &struct drm_minor.
  50. */
  51. int (*show)(struct seq_file*, void*);
  52. /** @driver_features: Required driver features for this entry */
  53. u32 driver_features;
  54. /** @data: Driver-private data, should not be device-specific. */
  55. void *data;
  56. };
  57. /**
  58. * struct drm_info_node - Per-minor debugfs node structure
  59. *
  60. * This structure represents a debugfs file, as an instantiation of a &struct
  61. * drm_info_list on a &struct drm_minor.
  62. *
  63. * FIXME:
  64. *
  65. * No it doesn't make a hole lot of sense that we duplicate debugfs entries for
  66. * both the render and the primary nodes, but that's how this has organically
  67. * grown. It should probably be fixed, with a compatibility link, if needed.
  68. */
  69. struct drm_info_node {
  70. /** @minor: &struct drm_minor for this node. */
  71. struct drm_minor *minor;
  72. /** @info_ent: template for this node. */
  73. const struct drm_info_list *info_ent;
  74. /* private: */
  75. struct list_head list;
  76. struct dentry *dent;
  77. };
  78. #if defined(CONFIG_DEBUG_FS)
  79. void drm_debugfs_create_files(const struct drm_info_list *files,
  80. int count, struct dentry *root,
  81. struct drm_minor *minor);
  82. int drm_debugfs_remove_files(const struct drm_info_list *files,
  83. int count, struct drm_minor *minor);
  84. #else
  85. static inline void drm_debugfs_create_files(const struct drm_info_list *files,
  86. int count, struct dentry *root,
  87. struct drm_minor *minor)
  88. {}
  89. static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
  90. int count, struct drm_minor *minor)
  91. {
  92. return 0;
  93. }
  94. #endif
  95. #endif /* _DRM_DEBUGFS_H_ */