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#include <drm/drm_gpuvm.h>
39
40/**
41 * DRM_DEBUGFS_GPUVA_INFO - &drm_info_list entry to dump a GPU VA space
42 * @show: the &drm_info_list's show callback
43 * @data: driver private data
44 *
45 * Drivers should use this macro to define a &drm_info_list entry to provide a
46 * debugfs file for dumping the GPU VA space regions and mappings.
47 *
48 * For each DRM GPU VA space drivers should call drm_debugfs_gpuva_info() from
49 * their @show callback.
50 */
51#define DRM_DEBUGFS_GPUVA_INFO(show, data) {"gpuvas", show, DRIVER_GEM_GPUVA, data}
52
53/**
54 * struct drm_info_list - debugfs info list entry
55 *
56 * This structure represents a debugfs file to be created by the drm
57 * core.
58 */
59struct drm_info_list {
60 /** @name: file name */
61 const char *name;
62 /**
63 * @show:
64 *
65 * Show callback. &seq_file->private will be set to the &struct
66 * drm_info_node corresponding to the instance of this info on a given
67 * &struct drm_minor.
68 */
69 int (*show)(struct seq_file*, void*);
70 /** @driver_features: Required driver features for this entry */
71 u32 driver_features;
72 /** @data: Driver-private data, should not be device-specific. */
73 void *data;
74};
75
76/**
77 * struct drm_info_node - Per-minor debugfs node structure
78 *
79 * This structure represents a debugfs file, as an instantiation of a &struct
80 * drm_info_list on a &struct drm_minor.
81 *
82 * FIXME:
83 *
84 * No it doesn't make a hole lot of sense that we duplicate debugfs entries for
85 * both the render and the primary nodes, but that's how this has organically
86 * grown. It should probably be fixed, with a compatibility link, if needed.
87 */
88struct drm_info_node {
89 /** @minor: &struct drm_minor for this node. */
90 struct drm_minor *minor;
91 /** @info_ent: template for this node. */
92 const struct drm_info_list *info_ent;
93 /* private: */
94 struct list_head list;
95 struct dentry *dent;
96};
97
98/**
99 * struct drm_debugfs_info - debugfs info list entry
100 *
101 * This structure represents a debugfs file to be created by the drm
102 * core.
103 */
104struct drm_debugfs_info {
105 /** @name: File name */
106 const char *name;
107
108 /**
109 * @show:
110 *
111 * Show callback. &seq_file->private will be set to the &struct
112 * drm_debugfs_entry corresponding to the instance of this info
113 * on a given &struct drm_device.
114 */
115 int (*show)(struct seq_file*, void*);
116
117 /** @driver_features: Required driver features for this entry. */
118 u32 driver_features;
119
120 /** @data: Driver-private data, should not be device-specific. */
121 void *data;
122};
123
124/**
125 * struct drm_debugfs_entry - Per-device debugfs node structure
126 *
127 * This structure represents a debugfs file, as an instantiation of a &struct
128 * drm_debugfs_info on a &struct drm_device.
129 */
130struct drm_debugfs_entry {
131 /** @dev: &struct drm_device for this node. */
132 struct drm_device *dev;
133
134 /** @file: Template for this node. */
135 struct drm_debugfs_info file;
136
137 /** @list: Linked list of all device nodes. */
138 struct list_head list;
139};
140
141#if defined(CONFIG_DEBUG_FS)
142void drm_debugfs_create_files(const struct drm_info_list *files,
143 int count, struct dentry *root,
144 struct drm_minor *minor);
145int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
146 struct dentry *root, struct drm_minor *minor);
147
148void drm_debugfs_add_file(struct drm_device *dev, const char *name,
149 int (*show)(struct seq_file*, void*), void *data);
150
151void drm_debugfs_add_files(struct drm_device *dev,
152 const struct drm_debugfs_info *files, int count);
153
154int drm_debugfs_gpuva_info(struct seq_file *m,
155 struct drm_gpuvm *gpuvm);
156#else
157static inline void drm_debugfs_create_files(const struct drm_info_list *files,
158 int count, struct dentry *root,
159 struct drm_minor *minor)
160{}
161
162static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
163 int count, struct dentry *root,
164 struct drm_minor *minor)
165{
166 return 0;
167}
168
169static inline void drm_debugfs_add_file(struct drm_device *dev, const char *name,
170 int (*show)(struct seq_file*, void*),
171 void *data)
172{}
173
174static inline void drm_debugfs_add_files(struct drm_device *dev,
175 const struct drm_debugfs_info *files,
176 int count)
177{}
178
179static inline int drm_debugfs_gpuva_info(struct seq_file *m,
180 struct drm_gpuvm *gpuvm)
181{
182 return 0;
183}
184#endif
185
186#endif /* _DRM_DEBUGFS_H_ */
187

source code of linux/include/drm/drm_debugfs.h