3 * debugfs support for DRM
5 * \author Ben Gamari <bgamari@gmail.com>
9 * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
11 * Copyright 2008 Ben Gamari <bgamari@gmail.com>
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14 * copy of this software and associated documentation files (the "Software"),
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18 * Software is furnished to do so, subject to the following conditions:
20 * The above copyright notice and this permission notice (including the next
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33 #include <linux/debugfs.h>
34 #include <linux/seq_file.h>
37 #if defined(CONFIG_DEBUG_FS)
39 /***************************************************
40 * Initialization, etc.
41 **************************************************/
43 static struct drm_info_list drm_debugfs_list[] = {
44 {"name", drm_name_info, 0},
45 {"vm", drm_vm_info, 0},
46 {"clients", drm_clients_info, 0},
47 {"queues", drm_queues_info, 0},
48 {"bufs", drm_bufs_info, 0},
49 {"gem_names", drm_gem_name_info, DRIVER_GEM},
50 {"gem_objects", drm_gem_object_info, DRIVER_GEM},
52 {"vma", drm_vma_info, 0},
55 #define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
58 static int drm_debugfs_open(struct inode *inode, struct file *file)
60 struct drm_info_node *node = inode->i_private;
62 return single_open(file, node->info_ent->show, node);
66 static const struct file_operations drm_debugfs_fops = {
68 .open = drm_debugfs_open,
71 .release = single_release,
76 * Initialize a given set of debugfs files for a device
78 * \param files The array of files to create
79 * \param count The number of files given
80 * \param root DRI debugfs dir entry.
81 * \param minor device minor number
82 * \return Zero on success, non-zero on failure
84 * Create a given set of debugfs files represented by an array of
85 * gdm_debugfs_lists in the given root directory.
87 int drm_debugfs_create_files(struct drm_info_list *files, int count,
88 struct dentry *root, struct drm_minor *minor)
90 struct drm_device *dev = minor->dev;
92 struct drm_info_node *tmp;
96 for (i = 0; i < count; i++) {
97 u32 features = files[i].driver_features;
100 (dev->driver->driver_features & features) != features)
103 tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
104 ent = debugfs_create_file(files[i].name, S_IFREG | S_IRUGO,
105 root, tmp, &drm_debugfs_fops);
107 DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s/%s\n",
108 name, files[i].name);
116 tmp->info_ent = &files[i];
117 list_add(&(tmp->list), &(minor->debugfs_nodes.list));
122 drm_debugfs_remove_files(files, count, minor);
125 EXPORT_SYMBOL(drm_debugfs_create_files);
128 * Initialize the DRI debugfs filesystem for a device
130 * \param dev DRM device
131 * \param minor device minor number
132 * \param root DRI debugfs dir entry.
134 * Create the DRI debugfs root entry "/sys/kernel/debug/dri", the device debugfs root entry
135 * "/sys/kernel/debug/dri/%minor%/", and each entry in debugfs_list as
136 * "/sys/kernel/debug/dri/%minor%/%name%".
138 int drm_debugfs_init(struct drm_minor *minor, int minor_id,
141 struct drm_device *dev = minor->dev;
145 INIT_LIST_HEAD(&minor->debugfs_nodes.list);
146 sprintf(name, "%d", minor_id);
147 minor->debugfs_root = debugfs_create_dir(name, root);
148 if (!minor->debugfs_root) {
149 DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name);
153 ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
154 minor->debugfs_root, minor);
156 debugfs_remove(minor->debugfs_root);
157 minor->debugfs_root = NULL;
158 DRM_ERROR("Failed to create core drm debugfs files\n");
162 if (dev->driver->debugfs_init) {
163 ret = dev->driver->debugfs_init(minor);
165 DRM_ERROR("DRM: Driver failed to initialize "
166 "/sys/kernel/debug/dri.\n");
175 * Remove a list of debugfs files
177 * \param files The list of files
178 * \param count The number of files
179 * \param minor The minor of which we should remove the files
180 * \return always zero.
182 * Remove all debugfs entries created by debugfs_init().
184 int drm_debugfs_remove_files(struct drm_info_list *files, int count,
185 struct drm_minor *minor)
187 struct list_head *pos, *q;
188 struct drm_info_node *tmp;
191 for (i = 0; i < count; i++) {
192 list_for_each_safe(pos, q, &minor->debugfs_nodes.list) {
193 tmp = list_entry(pos, struct drm_info_node, list);
194 if (tmp->info_ent == &files[i]) {
195 debugfs_remove(tmp->dent);
203 EXPORT_SYMBOL(drm_debugfs_remove_files);
206 * Cleanup the debugfs filesystem resources.
208 * \param minor device minor number.
209 * \return always zero.
211 * Remove all debugfs entries created by debugfs_init().
213 int drm_debugfs_cleanup(struct drm_minor *minor)
215 struct drm_device *dev = minor->dev;
217 if (!minor->debugfs_root)
220 if (dev->driver->debugfs_cleanup)
221 dev->driver->debugfs_cleanup(minor);
223 drm_debugfs_remove_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, minor);
225 debugfs_remove(minor->debugfs_root);
226 minor->debugfs_root = NULL;
231 #endif /* CONFIG_DEBUG_FS */