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_bridge.h>
35 #include <drm/drm_client.h>
36 #include <drm/drm_debugfs.h>
37 #include <drm/drm_device.h>
38 #include <drm/drm_drv.h>
39 #include <drm/drm_edid.h>
40 #include <drm/drm_file.h>
41 #include <drm/drm_gem.h>
42 #include <drm/drm_managed.h>
43 #include <drm/drm_gpuva_mgr.h>
45 #include "drm_crtc_internal.h"
46 #include "drm_internal.h"
48 #if defined(CONFIG_DEBUG_FS)
50 /***************************************************
51 * Initialization, etc.
52 **************************************************/
54 static int drm_name_info(struct seq_file *m, void *data)
56 struct drm_debugfs_entry *entry = m->private;
57 struct drm_device *dev = entry->dev;
58 struct drm_master *master;
60 mutex_lock(&dev->master_mutex);
62 seq_printf(m, "%s", dev->driver->name);
64 seq_printf(m, " dev=%s", dev_name(dev->dev));
65 if (master && master->unique)
66 seq_printf(m, " master=%s", master->unique);
68 seq_printf(m, " unique=%s", dev->unique);
70 mutex_unlock(&dev->master_mutex);
75 static int drm_clients_info(struct seq_file *m, void *data)
77 struct drm_debugfs_entry *entry = m->private;
78 struct drm_device *dev = entry->dev;
79 struct drm_file *priv;
83 "%20s %5s %3s master a %5s %10s\n",
90 /* dev->filelist is sorted youngest first, but we want to present
91 * oldest first (i.e. kernel, servers, clients), so walk backwardss.
93 mutex_lock(&dev->filelist_mutex);
94 list_for_each_entry_reverse(priv, &dev->filelist, lhead) {
95 bool is_current_master = drm_is_current_master(priv);
96 struct task_struct *task;
99 rcu_read_lock(); /* Locks priv->pid and pid_task()->comm! */
100 pid = rcu_dereference(priv->pid);
101 task = pid_task(pid, PIDTYPE_TGID);
102 uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
103 seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n",
104 task ? task->comm : "<unknown>",
107 is_current_master ? 'y' : 'n',
108 priv->authenticated ? 'y' : 'n',
109 from_kuid_munged(seq_user_ns(m), uid),
113 mutex_unlock(&dev->filelist_mutex);
117 static int drm_gem_one_name_info(int id, void *ptr, void *data)
119 struct drm_gem_object *obj = ptr;
120 struct seq_file *m = data;
122 seq_printf(m, "%6d %8zd %7d %8d\n",
123 obj->name, obj->size,
125 kref_read(&obj->refcount));
129 static int drm_gem_name_info(struct seq_file *m, void *data)
131 struct drm_debugfs_entry *entry = m->private;
132 struct drm_device *dev = entry->dev;
134 seq_printf(m, " name size handles refcount\n");
136 mutex_lock(&dev->object_name_lock);
137 idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
138 mutex_unlock(&dev->object_name_lock);
143 static const struct drm_debugfs_info drm_debugfs_list[] = {
144 {"name", drm_name_info, 0},
145 {"clients", drm_clients_info, 0},
146 {"gem_names", drm_gem_name_info, DRIVER_GEM},
148 #define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
151 static int drm_debugfs_open(struct inode *inode, struct file *file)
153 struct drm_info_node *node = inode->i_private;
155 return single_open(file, node->info_ent->show, node);
158 static int drm_debugfs_entry_open(struct inode *inode, struct file *file)
160 struct drm_debugfs_entry *entry = inode->i_private;
161 struct drm_debugfs_info *node = &entry->file;
163 return single_open(file, node->show, entry);
166 static const struct file_operations drm_debugfs_entry_fops = {
167 .owner = THIS_MODULE,
168 .open = drm_debugfs_entry_open,
171 .release = single_release,
174 static const struct file_operations drm_debugfs_fops = {
175 .owner = THIS_MODULE,
176 .open = drm_debugfs_open,
179 .release = single_release,
183 * drm_debugfs_gpuva_info - dump the given DRM GPU VA space
184 * @m: pointer to the &seq_file to write
185 * @mgr: the &drm_gpuva_manager representing the GPU VA space
187 * Dumps the GPU VA mappings of a given DRM GPU VA manager.
189 * For each DRM GPU VA space drivers should call this function from their
190 * &drm_info_list's show callback.
192 * Returns: 0 on success, -ENODEV if the &mgr is not initialized
194 int drm_debugfs_gpuva_info(struct seq_file *m,
195 struct drm_gpuva_manager *mgr)
197 struct drm_gpuva *va, *kva = &mgr->kernel_alloc_node;
202 seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n",
203 mgr->name, mgr->mm_start, mgr->mm_start + mgr->mm_range);
204 seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n",
205 kva->va.addr, kva->va.addr + kva->va.range);
207 seq_puts(m, " VAs | start | range | end | object | object offset\n");
208 seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n");
209 drm_gpuva_for_each_va(va, mgr) {
210 if (unlikely(va == kva))
213 seq_printf(m, " | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",
214 va->va.addr, va->va.range, va->va.addr + va->va.range,
215 (u64)(uintptr_t)va->gem.obj, va->gem.offset);
220 EXPORT_SYMBOL(drm_debugfs_gpuva_info);
223 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
225 * @files: The array of files to create
226 * @count: The number of files given
227 * @root: DRI debugfs dir entry.
228 * @minor: device minor number
230 * Create a given set of debugfs files represented by an array of
231 * &struct drm_info_list in the given root directory. These files will be removed
232 * automatically on drm_debugfs_cleanup().
234 void drm_debugfs_create_files(const struct drm_info_list *files, int count,
235 struct dentry *root, struct drm_minor *minor)
237 struct drm_device *dev = minor->dev;
238 struct drm_info_node *tmp;
241 for (i = 0; i < count; i++) {
242 u32 features = files[i].driver_features;
244 if (features && !drm_core_check_all_features(dev, features))
247 tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
252 tmp->dent = debugfs_create_file(files[i].name,
255 tmp->info_ent = &files[i];
257 mutex_lock(&minor->debugfs_lock);
258 list_add(&tmp->list, &minor->debugfs_list);
259 mutex_unlock(&minor->debugfs_lock);
262 EXPORT_SYMBOL(drm_debugfs_create_files);
264 int drm_debugfs_init(struct drm_minor *minor, int minor_id,
267 struct drm_device *dev = minor->dev;
268 struct drm_debugfs_entry *entry, *tmp;
271 INIT_LIST_HEAD(&minor->debugfs_list);
272 mutex_init(&minor->debugfs_lock);
273 sprintf(name, "%d", minor_id);
274 minor->debugfs_root = debugfs_create_dir(name, root);
276 drm_debugfs_add_files(minor->dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES);
278 if (drm_drv_uses_atomic_modeset(dev)) {
279 drm_atomic_debugfs_init(minor);
280 drm_bridge_debugfs_init(minor);
283 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
284 drm_framebuffer_debugfs_init(minor);
286 drm_client_debugfs_init(minor);
289 if (dev->driver->debugfs_init)
290 dev->driver->debugfs_init(minor);
292 list_for_each_entry_safe(entry, tmp, &dev->debugfs_list, list) {
293 debugfs_create_file(entry->file.name, 0444,
294 minor->debugfs_root, entry, &drm_debugfs_entry_fops);
295 list_del(&entry->list);
301 void drm_debugfs_late_register(struct drm_device *dev)
303 struct drm_minor *minor = dev->primary;
304 struct drm_debugfs_entry *entry, *tmp;
309 list_for_each_entry_safe(entry, tmp, &dev->debugfs_list, list) {
310 debugfs_create_file(entry->file.name, 0444,
311 minor->debugfs_root, entry, &drm_debugfs_entry_fops);
312 list_del(&entry->list);
316 int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
317 struct drm_minor *minor)
319 struct list_head *pos, *q;
320 struct drm_info_node *tmp;
323 mutex_lock(&minor->debugfs_lock);
324 for (i = 0; i < count; i++) {
325 list_for_each_safe(pos, q, &minor->debugfs_list) {
326 tmp = list_entry(pos, struct drm_info_node, list);
327 if (tmp->info_ent == &files[i]) {
328 debugfs_remove(tmp->dent);
334 mutex_unlock(&minor->debugfs_lock);
337 EXPORT_SYMBOL(drm_debugfs_remove_files);
339 static void drm_debugfs_remove_all_files(struct drm_minor *minor)
341 struct drm_info_node *node, *tmp;
343 mutex_lock(&minor->debugfs_lock);
344 list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) {
345 debugfs_remove(node->dent);
346 list_del(&node->list);
349 mutex_unlock(&minor->debugfs_lock);
352 void drm_debugfs_cleanup(struct drm_minor *minor)
354 if (!minor->debugfs_root)
357 drm_debugfs_remove_all_files(minor);
359 debugfs_remove_recursive(minor->debugfs_root);
360 minor->debugfs_root = NULL;
364 * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list
365 * @dev: drm device for the ioctl
366 * @name: debugfs file name
367 * @show: show callback
368 * @data: driver-private data, should not be device-specific
370 * Add a given file entry to the DRM device debugfs file list to be created on
373 void drm_debugfs_add_file(struct drm_device *dev, const char *name,
374 int (*show)(struct seq_file*, void*), void *data)
376 struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL);
381 entry->file.name = name;
382 entry->file.show = show;
383 entry->file.data = data;
386 mutex_lock(&dev->debugfs_mutex);
387 list_add(&entry->list, &dev->debugfs_list);
388 mutex_unlock(&dev->debugfs_mutex);
390 EXPORT_SYMBOL(drm_debugfs_add_file);
393 * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list
394 * @dev: drm device for the ioctl
395 * @files: The array of files to create
396 * @count: The number of files given
398 * Add a given set of debugfs files represented by an array of
399 * &struct drm_debugfs_info in the DRM device debugfs file list.
401 void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count)
405 for (i = 0; i < count; i++)
406 drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data);
408 EXPORT_SYMBOL(drm_debugfs_add_files);
410 static int connector_show(struct seq_file *m, void *data)
412 struct drm_connector *connector = m->private;
414 seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
419 static int connector_open(struct inode *inode, struct file *file)
421 struct drm_connector *dev = inode->i_private;
423 return single_open(file, connector_show, dev);
426 static ssize_t connector_write(struct file *file, const char __user *ubuf,
427 size_t len, loff_t *offp)
429 struct seq_file *m = file->private_data;
430 struct drm_connector *connector = m->private;
433 if (len > sizeof(buf) - 1)
436 if (copy_from_user(buf, ubuf, len))
441 if (sysfs_streq(buf, "on"))
442 connector->force = DRM_FORCE_ON;
443 else if (sysfs_streq(buf, "digital"))
444 connector->force = DRM_FORCE_ON_DIGITAL;
445 else if (sysfs_streq(buf, "off"))
446 connector->force = DRM_FORCE_OFF;
447 else if (sysfs_streq(buf, "unspecified"))
448 connector->force = DRM_FORCE_UNSPECIFIED;
455 static int edid_show(struct seq_file *m, void *data)
457 return drm_edid_override_show(m->private, m);
460 static int edid_open(struct inode *inode, struct file *file)
462 struct drm_connector *dev = inode->i_private;
464 return single_open(file, edid_show, dev);
467 static ssize_t edid_write(struct file *file, const char __user *ubuf,
468 size_t len, loff_t *offp)
470 struct seq_file *m = file->private_data;
471 struct drm_connector *connector = m->private;
475 buf = memdup_user(ubuf, len);
479 if (len == 5 && !strncmp(buf, "reset", 5))
480 ret = drm_edid_override_reset(connector);
482 ret = drm_edid_override_set(connector, buf, len);
486 return ret ? ret : len;
490 * Returns the min and max vrr vfreq through the connector's debugfs file.
491 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
493 static int vrr_range_show(struct seq_file *m, void *data)
495 struct drm_connector *connector = m->private;
497 if (connector->status != connector_status_connected)
500 seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq);
501 seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq);
505 DEFINE_SHOW_ATTRIBUTE(vrr_range);
508 * Returns Connector's max supported bpc through debugfs file.
509 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
511 static int output_bpc_show(struct seq_file *m, void *data)
513 struct drm_connector *connector = m->private;
515 if (connector->status != connector_status_connected)
518 seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);
522 DEFINE_SHOW_ATTRIBUTE(output_bpc);
524 static const struct file_operations drm_edid_fops = {
525 .owner = THIS_MODULE,
529 .release = single_release,
534 static const struct file_operations drm_connector_fops = {
535 .owner = THIS_MODULE,
536 .open = connector_open,
539 .release = single_release,
540 .write = connector_write
543 void drm_debugfs_connector_add(struct drm_connector *connector)
545 struct drm_minor *minor = connector->dev->primary;
548 if (!minor->debugfs_root)
551 root = debugfs_create_dir(connector->name, minor->debugfs_root);
552 connector->debugfs_entry = root;
555 debugfs_create_file("force", 0644, root, connector,
556 &drm_connector_fops);
559 debugfs_create_file("edid_override", 0644, root, connector,
563 debugfs_create_file("vrr_range", 0444, root, connector,
567 debugfs_create_file("output_bpc", 0444, root, connector,
570 if (connector->funcs->debugfs_init)
571 connector->funcs->debugfs_init(connector, root);
574 void drm_debugfs_connector_remove(struct drm_connector *connector)
576 if (!connector->debugfs_entry)
579 debugfs_remove_recursive(connector->debugfs_entry);
581 connector->debugfs_entry = NULL;
584 void drm_debugfs_crtc_add(struct drm_crtc *crtc)
586 struct drm_minor *minor = crtc->dev->primary;
590 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
594 root = debugfs_create_dir(name, minor->debugfs_root);
597 crtc->debugfs_entry = root;
599 drm_debugfs_crtc_crc_add(crtc);
602 void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
604 debugfs_remove_recursive(crtc->debugfs_entry);
605 crtc->debugfs_entry = NULL;
608 #endif /* CONFIG_DEBUG_FS */