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_gpuva_mgr.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 */
59 struct 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 */
88 struct 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 */
104 struct 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 */
130 struct 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)
142 void drm_debugfs_create_files(const struct drm_info_list *files,
143 int count, struct dentry *root,
144 struct drm_minor *minor);
145 int drm_debugfs_remove_files(const struct drm_info_list *files,
146 int count, struct drm_minor *minor);
147
148 void drm_debugfs_add_file(struct drm_device *dev, const char *name,
149 int (*show)(struct seq_file*, void*), void *data);
150
151 void drm_debugfs_add_files(struct drm_device *dev,
152 const struct drm_debugfs_info *files, int count);
153
154 int drm_debugfs_gpuva_info(struct seq_file *m,
155 struct drm_gpuva_manager *mgr);
156 #else
drm_debugfs_create_files(const struct drm_info_list * files,int count,struct dentry * root,struct drm_minor * minor)157 static 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
drm_debugfs_remove_files(const struct drm_info_list * files,int count,struct drm_minor * minor)162 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
163 int count, struct drm_minor *minor)
164 {
165 return 0;
166 }
167
drm_debugfs_add_file(struct drm_device * dev,const char * name,int (* show)(struct seq_file *,void *),void * data)168 static inline void drm_debugfs_add_file(struct drm_device *dev, const char *name,
169 int (*show)(struct seq_file*, void*),
170 void *data)
171 {}
172
drm_debugfs_add_files(struct drm_device * dev,const struct drm_debugfs_info * files,int count)173 static inline void drm_debugfs_add_files(struct drm_device *dev,
174 const struct drm_debugfs_info *files,
175 int count)
176 {}
177
drm_debugfs_gpuva_info(struct seq_file * m,struct drm_gpuva_manager * mgr)178 static inline int drm_debugfs_gpuva_info(struct seq_file *m,
179 struct drm_gpuva_manager *mgr)
180 {
181 return 0;
182 }
183 #endif
184
185 #endif /* _DRM_DEBUGFS_H_ */
186