2 * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
4 * Copyright 2008 Ben Gamari <bgamari@gmail.com>
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
26 #include <linux/debugfs.h>
27 #include <linux/export.h>
28 #include <linux/seq_file.h>
29 #include <linux/slab.h>
30 #include <linux/uaccess.h>
32 #include <drm/drm_atomic.h>
33 #include <drm/drm_auth.h>
34 #include <drm/drm_client.h>
35 #include <drm/drm_debugfs.h>
36 #include <drm/drm_device.h>
37 #include <drm/drm_drv.h>
38 #include <drm/drm_edid.h>
39 #include <drm/drm_file.h>
40 #include <drm/drm_gem.h>
42 #include "drm_crtc_internal.h"
43 #include "drm_internal.h"
45 #if defined(CONFIG_DEBUG_FS)
47 /***************************************************
48 * Initialization, etc.
49 **************************************************/
51 static int drm_name_info(struct seq_file *m, void *data)
53 struct drm_info_node *node = (struct drm_info_node *) m->private;
54 struct drm_minor *minor = node->minor;
55 struct drm_device *dev = minor->dev;
56 struct drm_master *master;
58 mutex_lock(&dev->master_mutex);
60 seq_printf(m, "%s", dev->driver->name);
62 seq_printf(m, " dev=%s", dev_name(dev->dev));
63 if (master && master->unique)
64 seq_printf(m, " master=%s", master->unique);
66 seq_printf(m, " unique=%s", dev->unique);
68 mutex_unlock(&dev->master_mutex);
73 static int drm_clients_info(struct seq_file *m, void *data)
75 struct drm_info_node *node = (struct drm_info_node *) m->private;
76 struct drm_device *dev = node->minor->dev;
77 struct drm_file *priv;
81 "%20s %5s %3s master a %5s %10s\n",
88 /* dev->filelist is sorted youngest first, but we want to present
89 * oldest first (i.e. kernel, servers, clients), so walk backwardss.
91 mutex_lock(&dev->filelist_mutex);
92 list_for_each_entry_reverse(priv, &dev->filelist, lhead) {
93 struct task_struct *task;
94 bool is_current_master = drm_is_current_master(priv);
96 rcu_read_lock(); /* locks pid_task()->comm */
97 task = pid_task(priv->pid, PIDTYPE_PID);
98 uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
99 seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n",
100 task ? task->comm : "<unknown>",
103 is_current_master ? 'y' : 'n',
104 priv->authenticated ? 'y' : 'n',
105 from_kuid_munged(seq_user_ns(m), uid),
109 mutex_unlock(&dev->filelist_mutex);
113 static int drm_gem_one_name_info(int id, void *ptr, void *data)
115 struct drm_gem_object *obj = ptr;
116 struct seq_file *m = data;
118 seq_printf(m, "%6d %8zd %7d %8d\n",
119 obj->name, obj->size,
121 kref_read(&obj->refcount));
125 static int drm_gem_name_info(struct seq_file *m, void *data)
127 struct drm_info_node *node = (struct drm_info_node *) m->private;
128 struct drm_device *dev = node->minor->dev;
130 seq_printf(m, " name size handles refcount\n");
132 mutex_lock(&dev->object_name_lock);
133 idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
134 mutex_unlock(&dev->object_name_lock);
139 static const struct drm_info_list drm_debugfs_list[] = {
140 {"name", drm_name_info, 0},
141 {"clients", drm_clients_info, 0},
142 {"gem_names", drm_gem_name_info, DRIVER_GEM},
144 #define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
147 static int drm_debugfs_open(struct inode *inode, struct file *file)
149 struct drm_info_node *node = inode->i_private;
151 return single_open(file, node->info_ent->show, node);
155 static const struct file_operations drm_debugfs_fops = {
156 .owner = THIS_MODULE,
157 .open = drm_debugfs_open,
160 .release = single_release,
165 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
167 * @files: The array of files to create
168 * @count: The number of files given
169 * @root: DRI debugfs dir entry.
170 * @minor: device minor number
172 * Create a given set of debugfs files represented by an array of
173 * &struct drm_info_list in the given root directory. These files will be removed
174 * automatically on drm_debugfs_cleanup().
176 void drm_debugfs_create_files(const struct drm_info_list *files, int count,
177 struct dentry *root, struct drm_minor *minor)
179 struct drm_device *dev = minor->dev;
180 struct drm_info_node *tmp;
183 for (i = 0; i < count; i++) {
184 u32 features = files[i].driver_features;
186 if (features && !drm_core_check_all_features(dev, features))
189 tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
194 tmp->dent = debugfs_create_file(files[i].name,
195 S_IFREG | S_IRUGO, root, tmp,
197 tmp->info_ent = &files[i];
199 mutex_lock(&minor->debugfs_lock);
200 list_add(&tmp->list, &minor->debugfs_list);
201 mutex_unlock(&minor->debugfs_lock);
204 EXPORT_SYMBOL(drm_debugfs_create_files);
206 int drm_debugfs_init(struct drm_minor *minor, int minor_id,
209 struct drm_device *dev = minor->dev;
212 INIT_LIST_HEAD(&minor->debugfs_list);
213 mutex_init(&minor->debugfs_lock);
214 sprintf(name, "%d", minor_id);
215 minor->debugfs_root = debugfs_create_dir(name, root);
217 drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
218 minor->debugfs_root, minor);
220 if (drm_drv_uses_atomic_modeset(dev)) {
221 drm_atomic_debugfs_init(minor);
224 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
225 drm_framebuffer_debugfs_init(minor);
227 drm_client_debugfs_init(minor);
230 if (dev->driver->debugfs_init)
231 dev->driver->debugfs_init(minor);
237 int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
238 struct drm_minor *minor)
240 struct list_head *pos, *q;
241 struct drm_info_node *tmp;
244 mutex_lock(&minor->debugfs_lock);
245 for (i = 0; i < count; i++) {
246 list_for_each_safe(pos, q, &minor->debugfs_list) {
247 tmp = list_entry(pos, struct drm_info_node, list);
248 if (tmp->info_ent == &files[i]) {
249 debugfs_remove(tmp->dent);
255 mutex_unlock(&minor->debugfs_lock);
258 EXPORT_SYMBOL(drm_debugfs_remove_files);
260 static void drm_debugfs_remove_all_files(struct drm_minor *minor)
262 struct drm_info_node *node, *tmp;
264 mutex_lock(&minor->debugfs_lock);
265 list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) {
266 debugfs_remove(node->dent);
267 list_del(&node->list);
270 mutex_unlock(&minor->debugfs_lock);
273 void drm_debugfs_cleanup(struct drm_minor *minor)
275 if (!minor->debugfs_root)
278 drm_debugfs_remove_all_files(minor);
280 debugfs_remove_recursive(minor->debugfs_root);
281 minor->debugfs_root = NULL;
284 static int connector_show(struct seq_file *m, void *data)
286 struct drm_connector *connector = m->private;
288 seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
293 static int connector_open(struct inode *inode, struct file *file)
295 struct drm_connector *dev = inode->i_private;
297 return single_open(file, connector_show, dev);
300 static ssize_t connector_write(struct file *file, const char __user *ubuf,
301 size_t len, loff_t *offp)
303 struct seq_file *m = file->private_data;
304 struct drm_connector *connector = m->private;
307 if (len > sizeof(buf) - 1)
310 if (copy_from_user(buf, ubuf, len))
315 if (sysfs_streq(buf, "on"))
316 connector->force = DRM_FORCE_ON;
317 else if (sysfs_streq(buf, "digital"))
318 connector->force = DRM_FORCE_ON_DIGITAL;
319 else if (sysfs_streq(buf, "off"))
320 connector->force = DRM_FORCE_OFF;
321 else if (sysfs_streq(buf, "unspecified"))
322 connector->force = DRM_FORCE_UNSPECIFIED;
329 static int edid_show(struct seq_file *m, void *data)
331 struct drm_connector *connector = m->private;
332 struct drm_property_blob *edid = connector->edid_blob_ptr;
334 if (connector->override_edid && edid)
335 seq_write(m, edid->data, edid->length);
340 static int edid_open(struct inode *inode, struct file *file)
342 struct drm_connector *dev = inode->i_private;
344 return single_open(file, edid_show, dev);
347 static ssize_t edid_write(struct file *file, const char __user *ubuf,
348 size_t len, loff_t *offp)
350 struct seq_file *m = file->private_data;
351 struct drm_connector *connector = m->private;
356 buf = memdup_user(ubuf, len);
360 edid = (struct edid *) buf;
362 if (len == 5 && !strncmp(buf, "reset", 5)) {
363 connector->override_edid = false;
364 ret = drm_connector_update_edid_property(connector, NULL);
365 } else if (len < EDID_LENGTH ||
366 EDID_LENGTH * (1 + edid->extensions) > len)
369 connector->override_edid = false;
370 ret = drm_connector_update_edid_property(connector, edid);
372 connector->override_edid = true;
377 return (ret) ? ret : len;
381 * Returns the min and max vrr vfreq through the connector's debugfs file.
382 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
384 static int vrr_range_show(struct seq_file *m, void *data)
386 struct drm_connector *connector = m->private;
388 if (connector->status != connector_status_connected)
391 seq_printf(m, "Min: %u\n", (u8)connector->display_info.monitor_range.min_vfreq);
392 seq_printf(m, "Max: %u\n", (u8)connector->display_info.monitor_range.max_vfreq);
396 DEFINE_SHOW_ATTRIBUTE(vrr_range);
398 static const struct file_operations drm_edid_fops = {
399 .owner = THIS_MODULE,
403 .release = single_release,
408 static const struct file_operations drm_connector_fops = {
409 .owner = THIS_MODULE,
410 .open = connector_open,
413 .release = single_release,
414 .write = connector_write
417 void drm_debugfs_connector_add(struct drm_connector *connector)
419 struct drm_minor *minor = connector->dev->primary;
422 if (!minor->debugfs_root)
425 root = debugfs_create_dir(connector->name, minor->debugfs_root);
426 connector->debugfs_entry = root;
429 debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector,
430 &drm_connector_fops);
433 debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector,
437 debugfs_create_file("vrr_range", S_IRUGO, root, connector,
441 void drm_debugfs_connector_remove(struct drm_connector *connector)
443 if (!connector->debugfs_entry)
446 debugfs_remove_recursive(connector->debugfs_entry);
448 connector->debugfs_entry = NULL;
451 void drm_debugfs_crtc_add(struct drm_crtc *crtc)
453 struct drm_minor *minor = crtc->dev->primary;
457 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
461 root = debugfs_create_dir(name, minor->debugfs_root);
464 crtc->debugfs_entry = root;
466 drm_debugfs_crtc_crc_add(crtc);
469 void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
471 debugfs_remove_recursive(crtc->debugfs_entry);
472 crtc->debugfs_entry = NULL;
475 #endif /* CONFIG_DEBUG_FS */