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_gpuvm.h>
45 #include "drm_crtc_internal.h"
46 #include "drm_internal.h"
48 /***************************************************
49 * Initialization, etc.
50 **************************************************/
52 static int drm_name_info(struct seq_file *m, void *data)
54 struct drm_debugfs_entry *entry = m->private;
55 struct drm_device *dev = entry->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_debugfs_entry *entry = m->private;
76 struct drm_device *dev = entry->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 bool is_current_master = drm_is_current_master(priv);
94 struct task_struct *task;
97 rcu_read_lock(); /* Locks priv->pid and pid_task()->comm! */
98 pid = rcu_dereference(priv->pid);
99 task = pid_task(pid, PIDTYPE_TGID);
100 uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
101 seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n",
102 task ? task->comm : "<unknown>",
105 is_current_master ? 'y' : 'n',
106 priv->authenticated ? 'y' : 'n',
107 from_kuid_munged(seq_user_ns(m), uid),
111 mutex_unlock(&dev->filelist_mutex);
115 static int drm_gem_one_name_info(int id, void *ptr, void *data)
117 struct drm_gem_object *obj = ptr;
118 struct seq_file *m = data;
120 seq_printf(m, "%6d %8zd %7d %8d\n",
121 obj->name, obj->size,
123 kref_read(&obj->refcount));
127 static int drm_gem_name_info(struct seq_file *m, void *data)
129 struct drm_debugfs_entry *entry = m->private;
130 struct drm_device *dev = entry->dev;
132 seq_printf(m, " name size handles refcount\n");
134 mutex_lock(&dev->object_name_lock);
135 idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
136 mutex_unlock(&dev->object_name_lock);
141 static const struct drm_debugfs_info drm_debugfs_list[] = {
142 {"name", drm_name_info, 0},
143 {"clients", drm_clients_info, 0},
144 {"gem_names", drm_gem_name_info, DRIVER_GEM},
146 #define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
149 static int drm_debugfs_open(struct inode *inode, struct file *file)
151 struct drm_info_node *node = inode->i_private;
153 if (!device_is_registered(node->minor->kdev))
156 return single_open(file, node->info_ent->show, node);
159 static int drm_debugfs_entry_open(struct inode *inode, struct file *file)
161 struct drm_debugfs_entry *entry = inode->i_private;
162 struct drm_debugfs_info *node = &entry->file;
163 struct drm_minor *minor = entry->dev->primary ?: entry->dev->accel;
165 if (!device_is_registered(minor->kdev))
168 return single_open(file, node->show, entry);
171 static const struct file_operations drm_debugfs_entry_fops = {
172 .owner = THIS_MODULE,
173 .open = drm_debugfs_entry_open,
176 .release = single_release,
179 static const struct file_operations drm_debugfs_fops = {
180 .owner = THIS_MODULE,
181 .open = drm_debugfs_open,
184 .release = single_release,
188 * drm_debugfs_gpuva_info - dump the given DRM GPU VA space
189 * @m: pointer to the &seq_file to write
190 * @gpuvm: the &drm_gpuvm representing the GPU VA space
192 * Dumps the GPU VA mappings of a given DRM GPU VA manager.
194 * For each DRM GPU VA space drivers should call this function from their
195 * &drm_info_list's show callback.
197 * Returns: 0 on success, -ENODEV if the &gpuvm is not initialized
199 int drm_debugfs_gpuva_info(struct seq_file *m,
200 struct drm_gpuvm *gpuvm)
202 struct drm_gpuva *va, *kva = &gpuvm->kernel_alloc_node;
207 seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n",
208 gpuvm->name, gpuvm->mm_start, gpuvm->mm_start + gpuvm->mm_range);
209 seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n",
210 kva->va.addr, kva->va.addr + kva->va.range);
212 seq_puts(m, " VAs | start | range | end | object | object offset\n");
213 seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n");
214 drm_gpuvm_for_each_va(va, gpuvm) {
215 if (unlikely(va == kva))
218 seq_printf(m, " | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",
219 va->va.addr, va->va.range, va->va.addr + va->va.range,
220 (u64)(uintptr_t)va->gem.obj, va->gem.offset);
225 EXPORT_SYMBOL(drm_debugfs_gpuva_info);
228 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
230 * @files: The array of files to create
231 * @count: The number of files given
232 * @root: DRI debugfs dir entry.
233 * @minor: device minor number
235 * Create a given set of debugfs files represented by an array of
236 * &struct drm_info_list in the given root directory. These files will be removed
237 * automatically on drm_debugfs_dev_fini().
239 void drm_debugfs_create_files(const struct drm_info_list *files, int count,
240 struct dentry *root, struct drm_minor *minor)
242 struct drm_device *dev = minor->dev;
243 struct drm_info_node *tmp;
246 for (i = 0; i < count; i++) {
247 u32 features = files[i].driver_features;
249 if (features && !drm_core_check_all_features(dev, features))
252 tmp = drmm_kzalloc(dev, sizeof(*tmp), GFP_KERNEL);
257 tmp->dent = debugfs_create_file(files[i].name,
260 tmp->info_ent = &files[i];
263 EXPORT_SYMBOL(drm_debugfs_create_files);
265 int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
266 struct dentry *root, struct drm_minor *minor)
270 for (i = 0; i < count; i++) {
271 struct dentry *dent = debugfs_lookup(files[i].name, root);
276 drmm_kfree(minor->dev, d_inode(dent)->i_private);
277 debugfs_remove(dent);
281 EXPORT_SYMBOL(drm_debugfs_remove_files);
284 * drm_debugfs_dev_init - create debugfs directory for the device
285 * @dev: the device which we want to create the directory for
286 * @root: the parent directory depending on the device type
288 * Creates the debugfs directory for the device under the given root directory.
290 void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root)
292 dev->debugfs_root = debugfs_create_dir(dev->unique, root);
296 * drm_debugfs_dev_fini - cleanup debugfs directory
297 * @dev: the device to cleanup the debugfs stuff
299 * Remove the debugfs directory, might be called multiple times.
301 void drm_debugfs_dev_fini(struct drm_device *dev)
303 debugfs_remove_recursive(dev->debugfs_root);
304 dev->debugfs_root = NULL;
307 void drm_debugfs_dev_register(struct drm_device *dev)
309 drm_debugfs_add_files(dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES);
311 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
312 drm_framebuffer_debugfs_init(dev);
313 drm_client_debugfs_init(dev);
315 if (drm_drv_uses_atomic_modeset(dev))
316 drm_atomic_debugfs_init(dev);
319 int drm_debugfs_register(struct drm_minor *minor, int minor_id,
322 struct drm_device *dev = minor->dev;
325 sprintf(name, "%d", minor_id);
326 minor->debugfs_symlink = debugfs_create_symlink(name, root,
329 /* TODO: Only for compatibility with drivers */
330 minor->debugfs_root = dev->debugfs_root;
332 if (dev->driver->debugfs_init && dev->render != minor)
333 dev->driver->debugfs_init(minor);
338 void drm_debugfs_unregister(struct drm_minor *minor)
340 debugfs_remove(minor->debugfs_symlink);
341 minor->debugfs_symlink = NULL;
345 * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list
346 * @dev: drm device for the ioctl
347 * @name: debugfs file name
348 * @show: show callback
349 * @data: driver-private data, should not be device-specific
351 * Add a given file entry to the DRM device debugfs file list to be created on
354 void drm_debugfs_add_file(struct drm_device *dev, const char *name,
355 int (*show)(struct seq_file*, void*), void *data)
357 struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL);
362 entry->file.name = name;
363 entry->file.show = show;
364 entry->file.data = data;
367 debugfs_create_file(name, 0444, dev->debugfs_root, entry,
368 &drm_debugfs_entry_fops);
370 EXPORT_SYMBOL(drm_debugfs_add_file);
373 * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list
374 * @dev: drm device for the ioctl
375 * @files: The array of files to create
376 * @count: The number of files given
378 * Add a given set of debugfs files represented by an array of
379 * &struct drm_debugfs_info in the DRM device debugfs file list.
381 void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count)
385 for (i = 0; i < count; i++)
386 drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data);
388 EXPORT_SYMBOL(drm_debugfs_add_files);
390 static int connector_show(struct seq_file *m, void *data)
392 struct drm_connector *connector = m->private;
394 seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
399 static int connector_open(struct inode *inode, struct file *file)
401 struct drm_connector *dev = inode->i_private;
403 return single_open(file, connector_show, dev);
406 static ssize_t connector_write(struct file *file, const char __user *ubuf,
407 size_t len, loff_t *offp)
409 struct seq_file *m = file->private_data;
410 struct drm_connector *connector = m->private;
413 if (len > sizeof(buf) - 1)
416 if (copy_from_user(buf, ubuf, len))
421 if (sysfs_streq(buf, "on"))
422 connector->force = DRM_FORCE_ON;
423 else if (sysfs_streq(buf, "digital"))
424 connector->force = DRM_FORCE_ON_DIGITAL;
425 else if (sysfs_streq(buf, "off"))
426 connector->force = DRM_FORCE_OFF;
427 else if (sysfs_streq(buf, "unspecified"))
428 connector->force = DRM_FORCE_UNSPECIFIED;
435 static int edid_show(struct seq_file *m, void *data)
437 return drm_edid_override_show(m->private, m);
440 static int edid_open(struct inode *inode, struct file *file)
442 struct drm_connector *dev = inode->i_private;
444 return single_open(file, edid_show, dev);
447 static ssize_t edid_write(struct file *file, const char __user *ubuf,
448 size_t len, loff_t *offp)
450 struct seq_file *m = file->private_data;
451 struct drm_connector *connector = m->private;
455 buf = memdup_user(ubuf, len);
459 if (len == 5 && !strncmp(buf, "reset", 5))
460 ret = drm_edid_override_reset(connector);
462 ret = drm_edid_override_set(connector, buf, len);
466 return ret ? ret : len;
470 * Returns the min and max vrr vfreq through the connector's debugfs file.
471 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
473 static int vrr_range_show(struct seq_file *m, void *data)
475 struct drm_connector *connector = m->private;
477 if (connector->status != connector_status_connected)
480 seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq);
481 seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq);
485 DEFINE_SHOW_ATTRIBUTE(vrr_range);
488 * Returns Connector's max supported bpc through debugfs file.
489 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
491 static int output_bpc_show(struct seq_file *m, void *data)
493 struct drm_connector *connector = m->private;
495 if (connector->status != connector_status_connected)
498 seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);
502 DEFINE_SHOW_ATTRIBUTE(output_bpc);
504 static const struct file_operations drm_edid_fops = {
505 .owner = THIS_MODULE,
509 .release = single_release,
514 static const struct file_operations drm_connector_fops = {
515 .owner = THIS_MODULE,
516 .open = connector_open,
519 .release = single_release,
520 .write = connector_write
523 void drm_debugfs_connector_add(struct drm_connector *connector)
525 struct drm_device *dev = connector->dev;
528 if (!dev->debugfs_root)
531 root = debugfs_create_dir(connector->name, dev->debugfs_root);
532 connector->debugfs_entry = root;
535 debugfs_create_file("force", 0644, root, connector,
536 &drm_connector_fops);
539 debugfs_create_file("edid_override", 0644, root, connector,
543 debugfs_create_file("vrr_range", 0444, root, connector,
547 debugfs_create_file("output_bpc", 0444, root, connector,
550 if (connector->funcs->debugfs_init)
551 connector->funcs->debugfs_init(connector, root);
554 void drm_debugfs_connector_remove(struct drm_connector *connector)
556 if (!connector->debugfs_entry)
559 debugfs_remove_recursive(connector->debugfs_entry);
561 connector->debugfs_entry = NULL;
564 void drm_debugfs_crtc_add(struct drm_crtc *crtc)
566 struct drm_device *dev = crtc->dev;
570 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
574 root = debugfs_create_dir(name, dev->debugfs_root);
577 crtc->debugfs_entry = root;
579 drm_debugfs_crtc_crc_add(crtc);
582 void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
584 debugfs_remove_recursive(crtc->debugfs_entry);
585 crtc->debugfs_entry = NULL;
588 static int bridges_show(struct seq_file *m, void *data)
590 struct drm_encoder *encoder = m->private;
591 struct drm_printer p = drm_seq_file_printer(m);
592 struct drm_bridge *bridge;
593 unsigned int idx = 0;
595 drm_for_each_bridge_in_chain(encoder, bridge) {
596 drm_printf(&p, "bridge[%d]: %ps\n", idx++, bridge->funcs);
597 drm_printf(&p, "\ttype: [%d] %s\n",
599 drm_get_connector_type_name(bridge->type));
602 drm_printf(&p, "\tOF: %pOFfc\n", bridge->of_node);
604 drm_printf(&p, "\tops: [0x%x]", bridge->ops);
605 if (bridge->ops & DRM_BRIDGE_OP_DETECT)
606 drm_puts(&p, " detect");
607 if (bridge->ops & DRM_BRIDGE_OP_EDID)
608 drm_puts(&p, " edid");
609 if (bridge->ops & DRM_BRIDGE_OP_HPD)
610 drm_puts(&p, " hpd");
611 if (bridge->ops & DRM_BRIDGE_OP_MODES)
612 drm_puts(&p, " modes");
618 DEFINE_SHOW_ATTRIBUTE(bridges);
620 void drm_debugfs_encoder_add(struct drm_encoder *encoder)
622 struct drm_minor *minor = encoder->dev->primary;
626 name = kasprintf(GFP_KERNEL, "encoder-%d", encoder->index);
630 root = debugfs_create_dir(name, minor->debugfs_root);
633 encoder->debugfs_entry = root;
636 debugfs_create_file("bridges", 0444, root, encoder,
639 if (encoder->funcs && encoder->funcs->debugfs_init)
640 encoder->funcs->debugfs_init(encoder, root);
643 void drm_debugfs_encoder_remove(struct drm_encoder *encoder)
645 debugfs_remove_recursive(encoder->debugfs_entry);
646 encoder->debugfs_entry = NULL;