include/drm/drm_debugfs.h

   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 <faith@valinux.com>
  10  * Author: Gareth Hughes <gareth@valinux.com>
  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
  32 #ifndef _DRM_DEBUGFS_H_
  33 #define _DRM_DEBUGFS_H_
  34
  35 #include <linux/types.h>
  36 #include <linux/seq_file.h>
  37 /**
  38  * struct drm_info_list - debugfs info list entry
  39  *
  40  * This structure represents a debugfs file to be created by the drm
  41  * core.
  42  */
  43 struct drm_info_list {
  44         /** @name: file name */
  45         const char *name;
  46         /**
  47          * @show:
  48          *
  49          * Show callback. &seq_file->private will be set to the &struct
  50          * drm_info_node corresponding to the instance of this info on a given
  51          * &struct drm_minor.
  52          */
  53         int (*show)(struct seq_file*, void*);
  54         /** @driver_features: Required driver features for this entry */
  55         u32 driver_features;
  56         /** @data: Driver-private data, should not be device-specific. */
  57         void *data;
  58 };
  59
  60 /**
  61  * struct drm_info_node - Per-minor debugfs node structure
  62  *
  63  * This structure represents a debugfs file, as an instantiation of a &struct
  64  * drm_info_list on a &struct drm_minor.
  65  *
  66  * FIXME:
  67  *
  68  * No it doesn't make a hole lot of sense that we duplicate debugfs entries for
  69  * both the render and the primary nodes, but that's how this has organically
  70  * grown. It should probably be fixed, with a compatibility link, if needed.
  71  */
  72 struct drm_info_node {
  73         /** @minor: &struct drm_minor for this node. */
  74         struct drm_minor *minor;
  75         /** @info_ent: template for this node. */
  76         const struct drm_info_list *info_ent;
  77         /* private: */
  78         struct list_head list;
  79         struct dentry *dent;
  80 };
  81
  82 #if defined(CONFIG_DEBUG_FS)
  83 int drm_debugfs_create_files(const struct drm_info_list *files,
  84                              int count, struct dentry *root,
  85                              struct drm_minor *minor);
  86 int drm_debugfs_remove_files(const struct drm_info_list *files,
  87                              int count, struct drm_minor *minor);
  88 #else
  89 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
  90                                            int count, struct dentry *root,
  91                                            struct drm_minor *minor)
  92 {
  93         return 0;
  94 }
  95
  96 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
  97                                            int count, struct drm_minor *minor)
  98 {
  99         return 0;
 100 }
 101 #endif
 102
 103 #endif /* _DRM_DEBUGFS_H_ */